wich of the following values represents an index of refraction of an actual material?
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.
113342
The index of refraction of kerosene at 20 degrees C is 1.448.
535452
simple  for smooth surfaces, the angle of incidence is equal to the angle of reflection\nso the angle of reflection is going to be the same angle mentioned in the question
339882
By snells law:\n\n(n1) Sin(Angle Of Incidence) = (n2) Sin(Angle Of Refraction)\n\nPut Angle of Incidence to be 0.\nYou will find the Angle of Refraction to be zero too.
159204
The speed of light in a vacuum is the reference for refractive index.  Thus for any color, the RI for vacuum is 1.
813541
Whenever a ray enters from glass medium to air medium, the light is reflected as well as refracted. That is both reflection and refraction take place.\n\nWhen the angle of incidence (in glass) is zero, the angle of refraction (in air) is also zero. This is called normal incidence and there is no reflection inside the glass.\n\nWhen the angle of incidence is increased from zero, there is both reflection and refraction. For refection the angle of incidence is equal to the angle of reflection and for refraction the angle of refraction (in air) is greater than the angle of incidence (in glass).\n\nWhen the angle of incidence equals the critical angle there is both reflection and refraction. For refection the angle of incidence is equal to the angle of reflection and for refraction the angle of refraction (in air) equals 90 degree.\n\nWhen the angle of incidence exceeds the critical angle, then there is no refraction and there is only reflection and the angle of incidence is equal to angle of reflection.\n\nThe ray not only is reflected internally but also is totally reflected, i.e., there is no refraction.  That is there is TOTAL internal reflection.
49259
c = yf\n\nc = speed of light (3 x 10^8 m/s)\ny = wavelength\nf = frequency\n\n==> f = c/y\n\n==> f = 3 x 10^8 m/s / 0.032 m \n\nf = 9.38 x 10^9 Hz\n\n-or-\n\nf = 9.38 GHz\n\n:)
61861
Refractive index of a material in respect to second = speed of light in second medium / speed of light in first medium\n\nand here\nfirst medium = air(since no other medium has been specified)\nsecond medium = water(given)\ntherefore\nrefractive index of water= speed of light in air/speed in water\n=3*10^8 / 2.25*10^8\n=4/3\n=1.333..\nhope u like the explanation
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.
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
579813
The glass of water is acting as a lens to refract the light coming from the clock.  Refraction is the bending of light rays as they pass through a medium such as water or glass.  Various materials refract light differently.  This fact is the basis for some analytical instruments such as the refractometer.  Also, light of different wavelengths is refracted differently within the same medium.  This, too, is a basis for the above mentioned analytical instruments.  But, the simple one word answer to your question is "refraction".
69632
Calcite, a form of calcium carbonate is one, and probably one of the most dramatic. Actually, every mineral except for those crystallized in the isometric system have a  double refraction. That's a consequence of directional anisotropy. Some have trirefringence, meaning three different refraction indexes.
727712
Speed of Light in Air = 2.99792458 X 10^8m/s\n\nTo get the refractive index,take the speed of light in air divide by the speed of the in another medium.\n\nHence is (2.99792458 X 10^8)/(2.5 X 10^8) = 1.2(approximate)
746486
I don't know if I exactly understand your question. Indices of refraction are dependent on both the medium and the frequency, so refraction in a car would depend on the frequency of the light, as well as where the light is incident.
422440
the wavelength is half...\n\nvavelength and frequency are inversely proportional
1060331
Electromagnetic waves. When a wave reaches a surface seperating two media refraction occurs.
793999
bcoz DIAMOND has the highest value of refractive index\n2.41\nany little amount of light present has to pass thru diamond \nso diamond glitters all the time