Geometrical Optics And Its Applications

Geometrical Optics And Its Applications Optics is the cornerstone of photonics systems and applications. Geometrical optics, or ray optics, is to study the geometry of paths of lights and their imagery through optical systems. Light will be treated as a form of energy which travels in straight lines called rays. When light comes to be regarded as waves, it will be seen that shadows cast by objects are not as sharp as rectili (Ariel Lipson,Stephen G. Lipson,Henry Lipson) (Ariel Lipson,Stephen G. Lipson,Henry Lipson, 2010)near propagation suggests due to diffraction and interference effects of wave. Thus, there is a simple assumption for geometrical optics, which is rays of light propagate along straight lines until they get reflected, refracted, or absorbed at a surface. 2 Fermats Principle 2.1 Background Fermats Principle, also known as the principle of the shortest optical path, was introduced by Pierre de Fermat in the early seventeenth century. This principle is used to state and explain the motion of light ray through different media, which helps to demonstrate laws of reflection and refraction later on. 2.2 Theory The path of a light ray connecting two points is the one for which the time of transit, but not the length, is a minimum. The time, T , for a light ray through space to travel from a point A to another point B can be calculated as: It is known that is velocity, which can also be regarded as for light, where c is the speed of light and n is the refractive index of the medium. Thus, we have Then the path taken by light should be the path that minimizes this integral, which would be: Therefore, it is the fact that light will travel along paths of stationary optical path length, where the optical path length is a local maximum or minimum with respect to any small variation in the path. And many paths will take exactly the same time to travel from point A to point B. (Ariel Lipson,Stephen G. Lipson,Henry Lipson, 2010) 3. Reflection 3.1 Derivation for Law of Reflection In general, law of reflection states that when a light ray incident upon a reflective surface, it will be reflected with an reflective angle that exactly equal to the incident angle with respect to the normal of the surface. Law of reflection can be dervied from Fermats Principle. Assume that the medium of the light travel is homogeneous, we haveC:UsersGaryDesktopà ¦Ã…“ ªÃƒ ¥Ã¢â‚¬ËœÃ‚ ½Ãƒ ¥Ã‚ Ã‚ .png Total path length S from A to B is Based on Fermats Principle we know that light would travel the path with minimum time. As in homogeneous medium, light travels with a constant speed and therefore the minimum time path is equilvant to the minimum distance path, which can be obtained by taking the first derivative of S with respect to x. which is sinà £Ã¢â‚¬Å¾Ã‚ ¥AOC = sin à £Ã¢â‚¬Å¾Ã‚ ¥BOC Thus shows that à £Ã¢â‚¬Å¾Ã‚ ¥AOC = à £Ã¢â‚¬Å¾Ã‚ ¥BOC, the angle of incidence equals the angle of reflection NB: It has to be reminded that the incident ray, the refracted ray and the normal are co-planar. (Philip D. Straffin, C. T. Benson, 1993) 3.2 Specular and Diffuse Reflection In details, there are two types of reflection Specular reflection and diffuse reflection. http://titan.bloomfield.edu/facstaff/dnicolai/images/ImagesPhy106/lesson2.gif Specular or regular reflection is said to occur when parallel rays reflect from a high smooth and flat surface. For instance, a flashlight beam is said to have specular reflection as the reflective surface is mirror which is highly smooth and it, hence, makes the reflected beams travel towards the same direction in parallel as in (a). Most object, however, reflect light diffusely and the rays in an incident parallel beam are reflected in many direction as in (b) because of diffuse reflection. Diffuse reflection is due to the surface of the object not being perfectly smooth like a mirror. In fact, under microscopic scale, the surface of most of objects, if not all, is quite rough. Although at each point on the surface the law of reflection is observed, the angle of incidence and the angle of reflection varies from point to point. Each of the initially parallel rays, therefore, is reflected in a different direction. 3.3 Mirror Concepts and its Applications 3.3.1 Image Formation with Mirrors Mirrors, undoubtedly, are ubiquitous in daily, especially used in mirror and optical instruments for gathering light and forming images. Law of reflection can be applied to use in locating the reflected image graphically as long as the size, location and orientation of the object is known. 3.3.1.1 Images in Plane Mirrors Images with mirrors are formed when many non-parallel light beams are reflected from the mirror surface and converge to form a corresponding image point. Image formed by plane mirror is erect, virtual, same size as the object and laterally inverted.C:UsersGaryDesktopreflection in mirror.png For a point object, in Fig 3.3.1.1a, rays from the object at O are reflected in all directions based on the laws of reflection so that they appear to come from a point I behind the mirror and this is where the observer imagines the image to be. For an extended object, in Fig 3.3.1.1b, the image of a point A on the object is at A, and two points are being equidistant from the mirror. Similarly, the image of point B is at B. The image size, therefore, is identical to the object seize, giving a magnification of unity. However, the right-hand side of the object becomes the left-hand side of the image and vice versa. The image is said to be laterally inverted.C:UsersGaryDesktopmirror extended object.png To conclude, a planar mirror is strictly stigmatic in nature Any incident rays issued from point A gives reflected rays passing through point B symmetrically to A with regard to the plane of the mirror. B, hence, is the image of A. (Katz, 2002) 3.3.1.2 Images in Curved Mirrors There are mainly two types of spherical mirrors, concave and convex. Similar to planar mirror, image can be traced using the law of reflection. Unlike image formed by planar mirror, which is always erect, virtual, same size as the object and laterally inverted, the image formed by a spherical mirror and its nature depend on the distance of the object from the mirror. To construct the image, we assume that small objects on the principal axes of mirrors of small aperture are being considered so that all rays are paraxial. Point images will, thus, be formed of points on the object. For concave mirrors, also known as converging mirrors because of their action on a parallel beam of light, is a mirror with a curved reflecting surface that bulges inward. The formation of image using concave mirror can be in different locations of the object can be concluded by the following figure. Concave Mirror The nature of image using concave mirror and its applications are summarized as below: Position of the object Position of the image Nature and size of the image Use At infinity At the focus Real, inverted and diminished As collector of radiation in solar heating devices Beyond the centre of curvature Between the focus and the centre of curvature Real, inverted and diminished At the centre of curvature At centre of curvature Real, inverted and same size as object As a reflecting mirror behind a projector lamp Between the focus and centre of curvature Beyond the centre of curvature Real, inverted and magnified In flood lights At focus At infinity Real, inverted and magnified As a reflecting mirror in car, head lights, search lights etc. Between the pole of the mirror and the focus Appears behind the mirror Virtual, erect and magnified As a shaving mirror or makeup mirror and dentists mirror (Katz, 2002) For convex mirrors, also known as diverging mirrors reflect the incoming parallel light beams to form divergent beams which appear to come from a point behind the mirror.Convex Mirror Unlike that in concave mirrors, the nature of image formed by convex mirror is always virtual, diminished and erect. (Katz, 2002) 3.3.2 Derivation of the mirror formula Mirror formula is useful when we have to calculate the image location. Using triangles 2 and 3, we have,http://scienceworld.wolfram.com/physics/mimg232.gif While using trangles 2 and 4, we have, Where is the image distance, is the object distance, f is the focal length, is the image height and is the object height It should be noticed that the sign convention is to be used in mirror formula. A real object or image distance is positive while a virtual object or image distance is negative. Magnification of a mirror image, m, can also be calculated by 3.3.3 Mirror instruments 3.3.3.1 Catoptric Systems Catoptric Systems is the system that merely consists of mirrors for the formation of image. (Board, 2012) 3.3.3.1.1 Newtonian telescopehttp://bdaugherty.tripod.com/gcseAstronomy/images/newtonian.jpg Newtonian telescope is the first reflecting telescope invented by Isaac Newton in 1668. It consists of a concave primary mirror and a small flat diagonal secondary mirror. In a bid to have a stigmatic axial image, a concave mirror has to be applied to act as a primary mirror and it reflects light back up the scope axis to the secondary mirror which is titled at 45o to the axis. The secondary mirror, which is a small plane mirror, is placed in the path of beams reflected by the primary mirror in order to divert the rays to one side of the tube. The reason for choosing a small mirror to act as secondary mirror is to prevent the influx of light beams is blocked from reaching the primary mirror. Pros of the Newtonian telescope Cons of the Newtonian telescope Less expensive Reduction of light intensity due to the blockage of central flat plane Shorter focal ratio leads a wider field of view Easily suffer from coma (i.e. an off-axis aberration) Free of chromatic aberration Simpler fabrication (Kitchin, 2012) 3.3.3.1.2 Cassegrain Telescope http://www.vikdhillon.staff.shef.ac.uk/teaching/phy217/telescopes/cassegrain.gif Cassegrain Telescope is another type of reflecting telescope employing two principal mirrors, a concave parabolic primary mirror like the Newtonians, but its secondary one is a convex hyperboloidal mirror. It makes use of the special properties of parabolic and hyperbolic reflectors. A concave parabolic reflector will reflect all incoming light rays parallel to its axis of symmetry to a single point, the focus. A convex hyperbolic reflector has two foci and will reflect all light rays directed at one of its two foci towards its other focus. The mirrors in this type of telescope are designed and positioned so that they share one focus and so that the second focus of the hyperbolic mirror will be at the same point at which the image is to be observed, usually just outside the eyepiece. The parabolic mirror reflects parallel light rays entering the telescope to its focus, which is also the focus of the hyperbolic mirror. The hyperbolic mirror then reflects those light rays to its other focus, where the image is observed. (Waland, 1990) 3.3.3.1.3 Gregorian telescope http://s4.hubimg.com/u/7341531_f520.jpg Gregorian telescope employs concave parabolic mirror to act as both primary and secondary mirror in this reflecting telescope. The light that first enters the tube is reflected by the primary concave mirrors and directed towards the secondary mirror, which is also a concave mirror. It will reflect the rays out to the telescope through the hole in its center. Observer can therefore view the image formed on the eyepiece. (Trà ¼mper, 2010) 3.3.3.2 Catadioptric Systems Catadioptric system, on the other hand, is the system that consists of both mirrors and lenses for the formation of image. (Board, 2012) Catadioptric Systems will not be included in this paper. 3.4 Other Applications 3.4.1 Optical lever and light-beam galvanometers Galvanometer is an instrument that used to measure very small electric currents. Some sensitive galvanometers would use a beam of light in conjunction with a small mirror as a pointer. When there exists current flowing in the electric wire, a tiny mirror that is fixed to the part of the meter will rotate. And a light beam from a fixed lamp falls on the mirror and is reflected onto a translucent scale. For a given current, the longer the pointer (i.e. the reflected beam) the greater the deflection observed on the scale. This simply applies the reflective nature of light wave. (A.M.Badadhe, 2006)http://www.daviddarling.info/images/moving-coil_galvanometer.jpg 3.4.2 Red-eye effect The Red-eye effect is a common phenomenon in photography. It occurs when the photographic flash unit place closely to the camera lens. Normally, the rationale of photo-taking is that light from the flash unit enters the eye and is reflected back to the camera lens. Nevertheless, under dark environment, pupil diameter would increase due to contraction of radial muscle fibers and relaxation of circular muscle fibers of iris under autonomic nervous system and therefore more light beams can enter into the retina of the eye. And the reflected light from the retina is red because of largely blood vessels in Choroid. It, therefore, gives the Red-eye effect in photograph. 3.4.3 Headlight of Carhttps://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEil0Lfoate3V8DkwR75E_7WuOtbKWPhImePutwYwUAoxRhdUfBbxWjUzgwnj2JkdZwISpigJdyhNye2f1AdX267rHmo7BVQyqBuhMDElIMKsXa5A24fXEBZmoXbUa5iAq9BPeIaToZyZ6E/s1600/infiniti+headlight.jpg It employs concave parabolic mirrors at the front of the car, which acts as reflectors in the head lights of cars, search lights etc. 3.4.4 Dentists Mirrorhttp://cdn7.fotosearch.com/bthumb/FSA/FSA132/x12292469.jpg Dentists Mirror applies reflection to reflect and focus light on the tooth so that dentists can be examined in detail. 3.4.5 Optical Comparatorhttp://www.worldoftest.com/img/products/qv300_1.jpg Optical Comparator is an instrument that projects a magnified image or profile of a part onto a screen for comparison to a standard overlay profile or scale based on the principles of optics. The comparator, basically, is a non-contact device, which frequently used to measure, test, inspect, gauge or examine parts for compliance with specifications. (A.M.Badadhe, 2006) 3.4.6 Security Convex Mirrorhttp://dgmglass.com/images/mirrors/security/mirror-s-3.jpg One of the distinguish feature of convex mirror is the widely view range. Therefore, convex mirror is applied to act as a security mirror in blind junctions of roads or at corners of walls of bug buildings. The person that is approaching from other side would be shown when the mirror is positioned properly. 3.4.7 Rear-view mirror in an automobilehttp://transport-futures.com/wp-content/uploads/2011/04/rear-view-mirror.jpg Knowing that the size of image of an object would be smaller when the object comes closer to the convex mirror, this unique feature can be applied to use on automobiles as rear view mirrors so that the diver can clearly view an approaching vehicle. 3.4.8 Submarines PeriscopeC:UsersGaryDesktopreflecting Periscope.png A periscope is a mirror instrument for observation from a concealed position. It works by employing two mirrors at 45o to each other, reflecting light rays from one place to another and finally out to the persons eye. 4 Refraction 4.1 Law of Refraction Qualitatively, when a light wave, which in fact composed of oscillating Electric fields and Magnetic field, crosses from a low optically density medium, say vacuum into a high optically density medium, say glass, E-Field and B-Fields are altered in terms of magnitude and direction of travel by the charges in the glass. Law of refraction, however, can be proved mathematically as follows: The first medium is supposed to be faster than the second medium and the speeds of propagation in 1st medium and 2nd medium are and respectively, where c is the speed of light in vacuum and n1, n2 à ¢Ã¢â‚¬ °Ã‚ ¥ 1. C:UsersLenovoDropboxU life2012-13, year2, 1st semesterCCST 9042 The world of wavesSnellslaw_diagram2.png Then, we have to evaluate the time taken by light ray from P to Q, which is Based on Fermats Principle, light travels the path with the least time. Thus, in an attempt to minimize the transit time, we set the derivative of time is zero and we have: By trigonometry, we have As and, we have This is Law of refraction, also known as Snell-Descartes law. NB: Similar to law of reflection, the incident ray, the refracted ray and the normal are co-planar. (Philip D. Straffin, C. T. Benson, 1993) 4.2 Total internal reflection According to Snells law, when a light travels from one a medium with a higher optical density, to a medium with a lower optical density, say from glass to air, it will be refracted away from the normal (i.e. Ray C in Fig 4.2a) and a weak internally reflected ray is, meanwhile, formed (i.e. Ray B in Fig 4.2a) C:UsersGaryDesktopà ¦Ã…“ ªÃƒ ¥Ã¢â‚¬ËœÃ‚ ½Ãƒ ¥Ã‚ Ã‚ 33.png Increasing the angle of incidence i increases the angle of refraction r, and at a certain angle of incidence c, called the critical angle, the reflected ray beam just emerges along the surface of the glass and the angle of refraction is 90o (i.e. Ray D in Fig 4.2b). In Fig 4.2 c, as the incident angle is increased continuously above critical angle (i.e. i > c), the refracted angle will be higher than 90o and sin r > 1, which is impossible and no refraction is possible. At this stage the internally reflected ray becomes bright and the refracted ray disappears. Hence, total internal reflection is now said to be occurring since all the incident light is reflected inside the optically denser medium. Mathematically, the critical angle can be found based on Snells law, which is Assume that n1 is refractive index of optically denser medium, n2 is refractive index of optically less dense medium, ÃŽÂ ¸1 is the critical angle of denser medium and ÃŽÂ ¸2 is the angle of refraction in less denser medium. All in all, for Total internal reflection to happen: Light must travel from denser medium to rarer medium. Angle of incidence should be greater than critical angle (i.e. i > c.) 4.3 Thin Lenses Thin lens is a lens that its axial thickness is small compared to the radii of curvature of its surfaces. (I.e. The thickness of the lens is negligible compared with the focal length of the lens) There are mainly two types of thin lenses, Converging thin lenses and Diverging thin lenses. Converging thin lenses, also known as convex lenses, direct parallel light rays bending toward one another after passing through them Diverging thin lenses, or so-called concave lenses, cause parallel light beams to spread as the leave the lens.http://t1.gstatic.com/images?q=tbn:ANd9GcT6lXrPj04wfnztVlEvIlewlbzvIzhu_60Cup8oDYd840MY3w0SiOxnzxaVrQ 4.3.1 Image Formed by Thin Lenses 4.3.1.1 Convex Lens Ray DiagramFormation of Image by a Convex Lens Object is located between focus and lens The image is: Virtual Erect Magnifiedobject at F1 2. Object is located at focus The image is: Real Inverted Magnified 3. Object is located between focus and F2 The image is:object between F2 F1 Real Inverted Magnified 4. Object is located at F2object between O F2 The image is: Real Inverted Same size as the object 5. Object is located beyond F2object beyond F2 The image is: Real Inverted Diminished 6. Object is located at infinityobject infinity The image is: Real Inverted Highly diminished 4.3.1.2 Concave Lens Ray Diagram 1. Object is located between focus and mirrorconcave lens object F O The image is: Erect Virtual Diminished 2. Object is located between mirror and infinityconcave lens object infinity O The image is: Erect Virtual Diminished 3. Object is located at infinityconcave lens object at infinity The image is: Erect Virtual Diminished 4.3.2 Derivation of the lens formula for thin lenses Gaussian lens formula, also known as lens formula, can be derived as follow: http://www.astarmathsandphysics.com/university_physics_notes/optics/university_physics_notes_proof_of_thin_lens_equation_html_5c3e1e20.gif As, (1) Where O is the size of the object and I is the size of the image. Also, Thus, Combine with (1), we have NB: The Cartesian Sign Convention for thin lens formulas are as follow: Light travels initially from left to right toward the lens. Object distance p is positive for real objects located to the left of the lens and negative for virtual objects located to the right of the lens. Image distance q is positive for real images formed to the right of the lens and negative for virtual images formed to the left of the lens. The focal length f is positive for a converging lens, negative for a diverging lens. The radius of curvature r is positive for a convex surface, negative for a concave surface. Transverse distances are positive above the optical axis, negative below (Katz, 2002) 4.3.3 Power of a Lens The optical power of the lens is used to describe the bending ability of lens in term of power. Basically the power of a lens of focal length f is, Power, in the case, can be expressed in m-1as the unit of power is diopter 1 D = 1m-1 Therefore, if there exists a convex of power 1D, its focal length equals to 1 meter. 4.4 Optical instruments 4.4.1 Prismshttp://upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Light_dispersion_conceptual_waves.gif/330px-Light_dispersion_conceptual_waves.gif Optical prisms are components that commonly used in optical experimental arrangements and optical instruments, with the role of illustrating dispersion of light beams. Rather than showing the complicated mathematical proof such as derivation of minimum deviation, application of prism will be illustrated below. (Thorington, 2009) 4.4.1.1 Prism BinocularsC:UsersGaryDesktopprism.png Prism Binoculars consist of a pair of refracting astronomical telescopes with two totally reflecting prisms (angles 90o, 45o, and 45o) between each objective and eyepiece. Prism A causes lateral inversion and prism B inverts verticallt so that the final image is the same way round and the same way up as the object. (Thorington, 2009) 4.4.1.2 PeriscopeC:UsersGaryDesktoppp.png Periscope, apart from using two reflecting mirror, employs two prisms. Under the occurring of total internal reflection on the hypotenuse, the incident rays and reflected rays are symmetric with regard to a plane orthogonal to the hypotenuse. In the case of normal incidence on one side of the right angle, the incident and reflected beams are orthogonal. 4.4.2 Magnifying Glasshttp://blog.timesunion.com/opinion/files/2011/02/0217_WVinternet.jpg Magnifying glass, also called Simple microscope, consist of a converging lens forming a virtual, upright, magnified image of an object placed inside its principal focus. For an object of height h is viewed at the near point by the unaided eye, the visual angle is, where D is the least distance of distinct visionhttp://www.astarmathsandphysics.com/ib_physics_notes/optics/ib_physics_notes_the_angular_magnification_of_a_magnifying_glass_when_the_image_is_formed_at_the_near_point_html_m367c081d.gif Now the object is placed at distance u from the lens, the visual angle subtended by its image is given by http://www.astarmathsandphysics.com/ib_physics_notes/optics/ib_physics_notes_the_angular_magnification_of_a_magnifying_glass_when_the_image_is_formed_at_the_near_point_html_f9ca6a7.gif The angular magnification is, therefore, given by 4.4.3 Compound Microscope Compound Microscope is a kind of optical instrument that uses visible light and a lens system to magnify images of small samples. C:UsersGaryDesktopcompound micropound.png The lens L1 nearer to the object, called the objective, forms a real, magnified, inverted image I1 of an object O placed just outside its principal focus Fo. I1 is just inside the principal focus Fo of the second lens L2, called the eyepiece, which act as a magnifying glass and produces a magnified, virtual image I2 of I1. In normal adjustment, the final image I2 lies at the near point. Then the visual angle subtended by the final image to the eye is given by When the object of height h is placed at the near point and viewed unaided, the visual angle subtended by the object is given by Hence, the angular magnification is given by And since, the linear magnification is equal to the linear magnification of the objective x linear magnification of the eyepiece. (Giordano, 2011) 4.4.4 Refracting Astronomical Telescope Refracting Astronomical Telescope consists of two converging lenses; one is an objective with long focal length and the other an eyepiece with short focal length. The objective L1 forms a real, diminished, inverted image I1, of a distant object at its principal focus Fo since the rays incident on L1 from a point on such an object can be assumed parallel. The eyepiece L2 acts as a magnifying glass and forms a magnified, virtual image of I1 and, when the telescope is in normal adjustment, this image is at infinity. I1 must, therefore, be at the principal focus F2 of L2, hence F0 and F2 coincide. http://images.tutorvista.com/content/optics/astronomical-telescope-magnifying-power.jpeg From the above figure, we find that The visual angle subtended by the object is given by and the visual angle subtended by the object is given by, where h is the image height. Therefore, the angular magnification is For telescope in normal adjustment, the separation of the two lenses is the sum of the focal lengths. And this, the foci of the objective lens and the eye-piece must be at the same place. (Giordano, 2011) 4.4.5 Galilean Telescopehttp://www.transtutors.com/userfiles/image/ARUN/IMAGES/Gal.JPG Galilean Telescope consists of two lenses a converging objective of large focal length and a diverging eyepiece of small focal length The angular magnification is 5. Conclusion In this term paper, the concepts of geometric optics are included comprehensively such as law of reflection, refraction, formation of images in mirrors and lens, etc. The notion of a light ray and the scientific study of light are involved in a bid to illustrating the working principle of different mirror and optical instruments, such as various telescope, efficiently.

Tales of Ise and The Tosa Diary Essay -- Literary Analysis

As seen in examples of monogatari such as Tales of Ise or nikki with The Tosa Diary, poetry is a very much used tool in the writings. While other examples of the two writing styles use poetry, these two examples best demonstrate the breaks in the writing style changes from a narrative and turns into something that takes on a more personal voice when it clearly goes into its poetic style. These poems are made to compliment the setting, such as in a poem credited to the former governor in The Tosa Diary where there is a description of the waves as they illustrate the governor’s sadness as he leaves Kyoto (83). Another point seen from this poem is that the governor is meant to be very good at constructing his poems and with it comes an example of a good poem as opposed to something that a commoner would have to write. Likewise, in the tenth of the Tales of Ise there are poems describing the love a man has for a woman while he is also comparing the physical setting, such as the mo untains. There are comparisons to Mt. Fuji and Mt. Utsu while they represent the waiting for his love or the beautiful vision that the man sees in his dreams with his love respectively (75-6). Such images of the scenery as seen alongside the desires or longing of those who write the poems are examples of how the poems are used to strengthen the narrative prose. Without the poems, the narrative prose in either the monogatari or the nikki would simply be a story and the significance would be lessened as there would not be the personal impact emanating from the characters and their feelings since a reader would only be able to read the description of the events and not get a feel of the thoughts from any of the characters. In the very deep illustrations of the... ...d to be a woman in the company of the boat. The significance lies in the possibility that with the different types of poetry in the narrative, the governor presents examples of the types of poems that should be written by different people coming from different classes. Looking back at the narratives and the significance of the poems in them is that many of the poems are inspired by nature around the authors. Also, the poems provide more of the voice of the authors instead of just the voice of the narrator and helps present the emotional tones of the characters in the narratives to the reader so that there can be more of a connection to it when it is being read. The poems make for a simple addition to the narrative and allows for a much more meaningful experience for a reader and makes for a much more engrossing story, thus adding to the to experience as a whole.

Effects of Commercialization Essay

Effects of Commercialization Commercialization is often confused with sales, marketing, or business development. â€Å"The rise of commercialization is an artifact of the growth of corporate power† (Gray Ruskin and Juliet Schor 487). Ruskin and Schor states that â€Å"corporations fostered the anti-tax movement and support for corporate welfare, which helped create funding crises in state and local governments and schools, and made them more willing to carry commercial adverting (487). Open-source communities have learned over time to integrate commercial interests into their development ranks without capitulating to those commercial interests. â€Å"Economists often assume that markets are inert, they do not affect the goods being exchange (Michael J. Sandel 492). Commercialization process has three key aspects: The Funnel it is essential to look at many ideas to get one or two products or businesses that can be sustained long-term, stage-wise process, and each stage has it s own key goals and milestones, and vital to involve key stakeholders early, including customers. There are so many outlooks of commercialization. The effects of commercialization are black Friday, attack on family values, and environment. The rise of commercialization is an artifact of the growth of corporate power† (Ruskin and Schor 487). Black Friday is one of the biggest shopping days of the year. Black Friday is the following Thanksgiving Day in the United States. Black Friday is not a holiday. Black Friday has become popular. Better than last minute Christmas sales. Retailers put their items on sale on Thanksgiving Morning. We realize the importance of Black Friday to retailers. It’s the day that the yearly sales finally move from the red deficit column into black profit. But its impetus, the blood sport of bargaining hunting, overshadows the meaning and the reason for Thanksgiving. Instead of giving thanks for what we have, too many salivate over what can be acquired. â€Å"Economics was becoming an imperial domain. Today, the logical of buying and selling no longer applies to material goods alone† (Michael J. Sandel 494). The family is the most  fundamental of society’s institutions, for it is within the family setting that lifetime behaviors and beliefs are established and values nurtured best in children including adolescent behavior. â€Å"The mother of the household says having less means her family appreciates p ossessions more† (Anna Quindlen 502). One key form of capitalist attack on the family lies in a process called commodification, in which capital seeks to undermine the natural forms of human interaction in all spheres of life and exchange them with commercial relations. In particular, capital strives to turn loving family relations. Healthy families are a challenge to capitalism. Family values and family ties are important institutions which, among others, affect numerous economic decisions. An historical perspective reveals that the conflict over the family may only be beginning and that we may be on the verge of a wider confrontation that will decide not only the survival of the family but fundamental questions about the scope and nature of the modern state. Political attacks on our families involve so many issues, there are many ways you can begin to talk to your child about them. â€Å"We did not arrive at this condition through any deliberate choice. It is almost as if it came upon us† (492). There is a massive environmental impact just in the sheer activity level of the community. The commercialization environment, the microeconomic and strategic conditions facing a firm that is translating an idea to a product, determines the most effective commercialization strategy, the process for bringing innov ation to the marketplace. â€Å"As corporations consolidate their control over governments and culture, we don’t expect an outright reversal of commercialization in the near future† (491). The crucial element of a firm’s commercialization strategy is whether it competes or cooperates with established firms. Commercialization strategy is thus one of the most crucial decisions a firm makes in terms of its ability to profit from technologies developed within the firm. Effective commercialization strategy results from careful analysis of the commercialization environment. Considering the benefits and costs of other strategies for securing profits and competitive advantage through innovation. â€Å"We live in a time when almost everything can be bought and sold (492). In conclusion, commercialization is often tangled with sales, marketing, or business development. Black Friday is one of the largest shopping days of the year. Black Friday is the following Thanksgiving Day in  the United States. The family is the most fundamental of society’s institutions, for it is within the family setting that lifetime behaviors and beliefs. There is a considerable environ mental impact just in the complete activity level of the community. Many technologies begin in the laboratory and are not practical for commercial use in their infancy. Works Cited Quindlen, Anna. â€Å"Stuff is Not Salvation.† Perspective on Contemporary Issues: Reading Across the Disciplines. Rd. Katherine Anne Ackley 7th ed. Stamford, CT: Cengage Learning. 2015 502-04. Print. Ruskin, Gray, and Schor, Juliet. Every Nook and Cranny: â€Å"The Dangerous Spread of Commercialized Culture.† Perspective on Contemporary Issues: Reading Across the Disciplines. Rd. Katherine Anne Ackley 7th ed. Stamford, CT: Cengage Learning. 2015 487-91. Print. Sandel, Michael. â€Å"What Isn’t for Sale?† Perspective on Contemporary Issues: Reading Across the Disciplines. Rd. Katherine Anne Ackley 7th ed. Stamford, CT: Cengage Learning. 2015 492-97. Print.

The Wanderer

I sat there on the bus, contemplating the abnormal events of the day and staring at the thick snow that lay outside. It was a long bus journey back to my house and I had a long time to spend with the not particularly talkative driver. I think the driver had become accustomed to my presence as I travelled on the bus every Friday night. He would always let me on the bus without charging me and wait for another ten minutes and see if anyone else got on, which they never did. I had not, for as long as I remember had a conversation with him, and had for a long time now forgotten the sound of his voice. The only sound I would hear on a typical journey was the quiet grumbling of the bus driver and the loud roaring of the buses engine. Nobody got on the bus this late at night. I was as I was saying, contemplating the events of the day, when I was interrupted mid thought by a more pressing realization. The bus was now stopping. This may seem a very normal thing for a bus to do, this bus however never stopped except for myself. The bus had stopped to let on another passenger. I looked forward to this, as my usual journey would include no human interaction. The passenger was a man, that I guessed to be in his mid thirties. I took a quick look up and down him. I looked up and down him again with a bit more detail. No snow, he must have been standing at the bus stop for a little while, as buses never come on time, yet he had avoided getting any snow on him. My own boots were cased in a think slushy mess, but his fine black shoes were hardly even wet. My jeans and thick jacket, which I was quite fond of, were no longer covered in snow but were wet from the snow that had melted in the comfortable warmth of the bus. His trousers that had been ironed to perfection and the suit that he wore were both black as midnight and looked of incredible quality. The man himself was bald and was cleanly shaven; he was yet to face me as he was talking to the bus driver. He carried nothing in his hands but kept his body still with his arms by his sides while talking. I started to hear their conversation after I was done scanning his person. â€Å"Shame that it had to happen isn't it?† The bus driver said in a burst of conversation. This in itself came as a shock to my system; it was such a long time since the bus driver had spoken in my presence. What was a real shock is what came next. â€Å"Yes, the poor elderly lady must have been quite shaken by the ordeal.† replied the stranger. His voice was eerie. He talked normally of course, but that was the problem, it was too normal. He voice stayed at the same volume and pitch all the time, he didn't change the level of excitement in his voice. He had no accent, he spoke perfectly and I was surprised to find that the bus driver, who had a strong accent, could understand him. It was then I realised that they were in fact talking about what they had interrupted me thinking about. Earlier in my day I had witnessed an attack on an elderly lady. A young teenager had an interest in her handbag and its contents. My good nature combined with my belief that today's youth should not be able to do as they please, caused me to leap into action. I had started shouting at the young boy and walking towards him, I expected him to run away and that to be the end of it. I pushed the boy back from the old lady and told her that she would be okay and should hurry home. It was after this as I was swinging round to give the boy a stern talking to, that I felt a sharp blow to my neck and then it was black. I woke up about two minutes later with a bit of a sore neck but otherwise unharmed. The stranger walked down the bus and sat at a seat just in front of mine. I had seen his face as he walked down but there was nothing interesting about it, apart from the fact there was nothing interesting about it. He sat with the same amazingly straight posture as when he was standing. â€Å"Where you gettin' off then?† the driver cried down the bus. â€Å"Crescent Road† the stranger replied. â€Å"Oh, surprise surprise† the bus driver chuckled to himself. The stranger didn't understand what the bus driver was talking about but I did. The bus driver still only had to make the one stop because mine and the stranger's stops were in fact the same. I thought this to be a remarkable coincidence. I returned to watching the snow falling gently outside. The night sky seemed to give me the impression that tonight was different in some way to every other night. I was snapped out of this small trance by the stranger standing and making his way to the front of the bus. Fortunately he was on the bus to remind me that at some point I would have to get off, and up I leapt. The bus pulled in to the stop as I staggered to keep my balance. The stranger moved to the side to let me past and to say thank you to the driver. I got off the bus and stepped onto the crisp snow that had just fallen. The stranger followed and we started on our way home. The stranger barged past me and started to walk briskly. I thought this to be quite rude and so I started to walk just as briskly to catch up with him. Even when in a hurry the man walked with impeccable posture. â€Å"I much prefer the summer to this.† I said jokingly in an attempt to spark a conversation. The man simply took a deep breath and proceeded to walk more slowly. I walked beside him, he looked quite troubled. I felt compelled to try and comfort him. I reached to put my hand on his shoulder as my brain prepared my next sentence. He stopped. His head darted in the direction of my face. It was not that he was looking at me, more that he was looking exactly in my direction. His look was empty and cold. He continued on his way and I kept my distance, I hoped he would enter one of the houses that we were passing but he didn't. He continued to wander the same way as I was. He wandered across the small road we came to and up onto the footpath that lead up to my cul-de-sac. The road was known for being dangerously icy. The path was also terribly dark and had trees along either side. This was all well and good during the daylight hours, but at night however the trees took on a more sinister presence and seemed to position themselves to block out the view of the moon or any other source of light. In front of me was the man, no more than five metres away. I could only just make out his suit and trousers. I could only just make out his shape. He was getting further away from me. I was trying to navigate the slippier parts of the path. â€Å"Are you having as much trouble as I am?† I exclaimed trying again to get the attention of the wanderer. â€Å"Don't be silly† the wanderer turned and said. I could only just make out his face and was unsure whether he was talking to me or himself. Before I could come to this decision he turned and started the brisk walking again. I followed to catch up with him and was looking for him through the black screen that was in front of my eyes. I hit the ground. It hurt and I was catching up on what had just happened. I had tripped up on the shape of the wandering man. He had fallen in on the ice and from what I could see had hit his head off the ground. I leant over to help him up but was knocked away as he lifted himself off the hard frozen ground. He held his hand to his head, and I was now quite worried about him, he looked like he had hit the ground with some force. He looked very frightened and was almost running along the road. We exited the small wooded path and to a fork in the road. I could see my house from here it was the first in the cul-de-sac on the right. The wandering stranger made his way along the road to the left and I felt it was my duty to follow him and to see if he was okay. Luckily for him his house was not far along the road and he entered the front gate of an impressive looking building, the wanderer had found his home. He left the gate open for me and I entered the garden. He entered the house and I followed. I stood in his porch as he rushed upstairs. I heard the sound of running water and I assumed that he was cleaning himself up. He returned a short while after and came slowly down the stairs. He was talking to a woman which I can only presume was his wife. â€Å"I am fine really, I just got a bit shook up along the path there† the man said. â€Å"I do worry about you, you know† Replied his wife â€Å"Look what happened to that kind gentleman in town today. He helps an old lady get her handbag back and gets beaten to death† I stood there baffled, and felt a shiver down my spine. I started to feel myself slipping away as I struggled with the events of the day. I had stopped wandering, I had found my home and I knew where I had to go†¦

Endothermic Reaction Examples

Endothermic Reaction Examples Heres a list of examples of endothermic reactions. You can use these when asked to cite an example or to get ideas to set up a demonstration of an endothermic reaction or process. Endothermic Reaction Definition An endothermic reaction is any chemical reaction that absorbs heat from its environment. The absorbed energy provides the activation energy for the reaction to occur. A hallmark of this type of reaction is that it feels cold. Endothermic Chemical Reactions A good example of an endothermic reaction includes dissolving a salt. It doesnt have to be table salt, nor does the solvent need to be water. The reaction of barium hydroxide octahydrate crystals with dry ammonium chlorideDissolving ammonium chloride in waterThe reaction of thionyl chloride (SOCl2) with cobalt(II) sulfate heptahydrateMixing water and ammonium nitrateMixing water with potassium chlorideReacting ethanoic acid with sodium carbonatePhotosynthesis (chlorophyll is used to react carbon dioxide plus water plus energy to make glucose and oxygen) Endothermic Processes These examples could be written as chemical reactions, but are more generally considered to be endothermic or heat-absorbing processes: Melting ice cubesMelting solid saltsEvaporating liquid waterConverting frost to water vapor (melting, boiling, and evaporation, in general, are endothermic processesMaking an anhydrous salt from a hydrateForming a cation from an atom in the gas phaseSplitting a gas moleculeSeparating ion pairsCooking an eggBaking bread Endothermic and Endergonic An endothermic reaction is a type of endergonic reaction. However, not all endergonic reactions are endothermic. Endothermic reactions involve heat absorption. Other forms of energy which might be absorbed in an endergonic reaction include sound and light.

Film Essay Example | Topics and Well Written Essays - 250 words - 5

Film - Essay Example iewiczs and was an ingenious way of attacking Hearst the newspaper mogul through an evolution character Foster Kane, and focuses on a fierce duel to expose dirty under deals of a society that was suffering from social morals and integrity among many leaders and business executives. The film satires and portrays the rise of the penny press, the power of political heavy weights, rise of fascism, support for a Spanish –American war, and the growth in space for celebrity journalism. The film aims at revealing the burial truth about Kane (Rudolf Hearst), a highly regarded lord and ruler of San Simeon against a young brilliant and ambitious boy who is determined to take Hearst down by exposing his dirty deals involving Hollywood and newspaper publications. Consequently, Hearst with all his power and might goes ahead to shut the film down, and even teams up with the some Hollywood executives under the leadership of Mayor B. Louis who at a any cost attempted to buy Citizen Kane from Welles to destroy it and protect Hearst’s reputation, characteristic of any respected leader in the American society. The story thus pitted two proud, destructive, and gifted geniuses against each other, leading to destruction of each other to what the Producer Lennon Thomas remarked, "The fight that ruined them both was thoroughly in character with how theyd lived their lives"Â  (WBGH, 2009). The war between the two daring old wealthy and respected newspaper magnate Hearst and a 24 year old yet ambitious and determined news reporter ended destroying each other. However, Welles drove the point home after a long freeze of the film by Hollywood; Hearst incidentally built his vast empire selling papers with highly entertaining stories, which were scandalous to others, and sometimes were pure fiction. The ruthless, skillful and open contempt for Hollywood thus led to the success of Welles, and in 1942, the film though named for seven categories lost all but the best screenplay after which the

Business Strategies for the Firm Tetra Pak Essay

Business Strategies for the Firm Tetra Pak - Essay Example Tetra Pak joined Global Forest and Trade Network (GFTN) which is an initiative of WWF with intent to manage the usage of wood fiber (Environmental leader). Later in 2005, Tetra Pak began another venture with WWF when it joined Climate Savers project that encourages the companies to reduce their greenhouse emissions. These two programs indicate Tetra Pak’s concerns on environmental safety as one of its main objectives. Through the Climate Savers program, the organization aims at achieving increased energy efficiency at production sites and finding renewable materials and energy. Tetra Pak believed that integrating energy efficiency with the purchase of green energy would assist the company to keep absolute energy consumption stable while reducing dreadful greenhouse emissions (Climate innovation case study). In order to meet the extra premium price of green energy, Tetra Pak plans to utilize savings from high energy efficiency. The relationship between Climate Savers and thereby WWF has assisted Tetra Pak to set a clear and definite internal target. By the end of 2006, the firm could bring proposed organizational changes into practice. Tetra Pak jointly operates with World Class Manufacturing (WCM) which focuses on regular improvements in cost, quality, lead time, flexibility, and customer service (Foodproductiondaily.com). In order to carry out these operations efficiently, the WCM cooperatively work with the Tetra Pak’s pillars (teams) which contain several areas such as cost, quality, focused improvement, maintenance, and safety. This area focused activities have aided the organization to increase its operational efficacy. As the part of the restructuring in strategic alignment, the factories at the Tetra Pak altered the energy efficiency operations. It is identified that this conversion process fundamentally differs from traditional approaches as it gives specific emphasis on implementing solutions for environment-related manufacturing problems. In short, the â€Å"pillar approach† enabled the Tetra Pak to efficiently deal with different types of manufacturing related issues that would seriously impinge on the environmental safety.