Refraction by a prism?
925429
Different wavelength (colour) of Light when passed through prism refract (bend) by diferent angles...\nWhen red light is passed .. as it is composed by only on single wavelength, it, as a whole, bends by the same angle..\nSo, there will be a deviation, but no spliiting....\n\nWhite light has many colours super imposed ( made of many wavelength) and hence each component bends by diferent angles ... causing \nwhat is called, Dispersion.of white light
4925
you either need more information, or this is a trivial problem. \n\ni am assuming the two surfaces of the glass are parallel to each other, so it's not a prism or lens, but a thin flat plate.\n\ntreating it very simply, you could argue that energy is conserved, so the irradiance (which is energy per second per square meter) must be conserved.  the speed of light is fixed in air, so the "per second" part is fixed too.  if the glass surfaces are not angled with respect to each other, then the light leaves the glass taking up the same area that it went in with.  this means the irradiances are the same.\n\nthis is a simplistic physical model, though.  realistically, you will get some reflection at the air-glass interface, reflection at the glass-air interface, and some absorption (both in the air and in the glass).  you need a lot more details about the problem to say anything meaningful though.
412289
The definition of the index of refraction for a material (n) is the speed of light in vacuum (c) divided by the speed of light in the material(v) or in equation form;\n                      n = c/v \nSince the speed of light in vacuum is the maximum possible speed then (v) must be smaller than (c), or at the most as large as (c), and the fraction (c/v) must therefore be larger than one because we have a bigger number divided by a smaller number.  Since D is the only fraction larger than one it is the only answer that can possibly be correct.
675011
The angle of incidence inside the prism is 25. (the ray passes straight into the prism as it is incident normally).\n \n\nmu = sin a/ sin g( g is the angle in glass and a is the angle in air)\nSin a = mu sin g \n\nsin a = 1.662 sin 25\n\nr = 45 \n for 1.698 , r =45.8 = 46.
440395
Refracted light rays bend toward the normal when the material being entered has a higher index of refraction then the material you are coming from.  Reflected light behaves according to total internal reflection, and bounces off the surface at the same angle that it approached at, much like skipping a stone off a lake's surface.  Check out snell's law on wikipedia for more.
634321
Every time the ray of light goes from one mirror to the other, it goes through a certain distance d along the mirrors axis (in the 20m direction).   The law of reflection says that the angle of incidence is the same angle as the one the ray will leave the mirror surface, so, we can build a right triangle, with the reflected ray of light as the hypotenuse.  So, we have:\n\nr*Sin( theta ) = d    and   r*Cos( theta ) = a\n\nDividing the first over the second:\n\nSin( theta ) / Cos ( theta ) = d / a\n\nOr:    Tan( theta ) = d / a\n\n            --->   d = a*Tan( theta )\n\ntheta being 30 degrees and a being 10cm = 0.1m\n\nNow, just divide 20m over d and you're good to go.\n\nHope I helped.
204082
i think it might be called a triangular prism\ni am srry that was tough i was trying to get it rite so i could get the ten points for best answer. I AM SORRY!
626191
I did find 0.47 for the refraction index "http://www.robinwood.com/Catalog/Technical/Gen3DTuts/Gen3DPages/RefractionIndexList.html" but I I do not know at what wave lenght that I am not seeing probably for green or blue. I found another values has well following:\nhttp://engr.smu.edu/ee/smuphotonics/Modeig/pages/MISC/RNCRIM.DOC\nn=0.18+i*5.72 for 900nm (near infrared)\nn=0.08+i*4.98 for 827nm (red)\n\nI do think it changes a lot with the wavelenght that you input\n\nI do not now if you know what the i means but is the imaginary part of the refraction index it reflects the absorption that light will suffer in the metal. Gold has a metal behaves to the the light much has it behaves  the plasma ones it has free electrons. This explines 2 things the imaginary part and second the value that is minus then 1. the imaginary part is due to the current that are induced when the light incidates in the metals it creates a current that consequently creates an energy lost. (ohm`s theorem) second the efect that is minus then one reflects that the phase velocity seams to propagate at a velocity larger then the velocity of light in vacuum ( its a rouder normal stuff in plasmas if you want to know more tell me I can inform you). Atention this does not mean that the energy travels faster then c it just means the phase does. \n\nif you want me to tell you why is it faster then light it is a litle bit more complicated but if you insist tell me
368659
No, as da 1st prism 'll split it into da spectrum (VIBGYOR) & da 2nd 'll just refract da spectrum & not convert it again into white light.
843731
there is an optical effect like this ( it is just a refraction at an interface - like water and air ) and sorry i can't remember either ( i will search tho )\n\ncool i searched the term ATMOSPHERIC REFRACTION and guess what LOL( go to Wikipedia )
476594
Would that be refraction?
385070
Sorry but clear isn't a colour. And i think  a prism is a refraction of light not a reflection.In optics, a prism is a device used to refract light, reflect it or break it up (to disperse it) into its constituent spectral colours (colours of the rainbow). The traditional geometrical shape is that of a triangular prism, with a triangular base and rectangular sides. Some types of optical prisms are not in fact in the shape of geometric prisms.\n\nAs light moves from one medium (e.g. air) to another denser medium (the glass of the prism), it is slowed down and as a result either bent (refracted) or reflected. The angle that the beam of light makes with the interface as well as the refractive indices of the two media determine whether it is reflected or refracted, and by how much (see refraction, total internal reflection).\n\nReflective prisms are used to reflect light, for instance in binoculars, since they are easier to manufacture than mirrors. Dispersive prisms are used to break up light into its constituent spectral colours because the refractive index depends on frequency (see dispersion); the white light entering the prism is a mixture of different frequencies, each of which gets bent slightly differently. Blue light is slowed down more than red light and will therefore be bent more than red light. There are also polarizing prisms (also known as birefringent prisms) which can split a beam of light into components of varying polarization.\n\nIsaac Newton first thought that prisms split colours out of colourless light. Newton placed a second prism such that a separated colour would pass through it and found the colour unchanged. He concluded that prisms separate colours. He also used a lens and a second prism to recompose the rainbow into white light.
12726
The angle of refraction of the sunlight as it comes through the atmosphere. At sunset the colors change because the angle gets steeper. Its like a prism.
419817
deviation= (refractive index -1)*angle of prism\n\nif prism angle is small...\nand\ndependence of rf with wavelength is given by cauchy's formula\n\nrf= A/wavelength....  A is constant\n\nso dependence (deviation) proportional to [(1/wavelength) -1)]
990675
Are they not one in the same?  Light rays and parallel light rays?  converged..in a convex lens, diffracted in a prism.
422475
Angle at which light is totally reflected. \n\nThis website has a good diagram.\n\nhttp://www.physicsclassroom.com/Class/refrn/U14L3c.html
519599
The index of refraction of water is 1.33.  The refraction of light from the air to the water creates an apparent magnification of objects below the surface.  This magnification gives the impression that things are closer than they are and that the water looks shallower.