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how to find speed of light through glass. Violet travels the slowest so it is on the bottom and red travels the fastest so is on the top. The tendency of a ray of light to bend one direction or another is dependent upon whether the light wave speeds up or slows down upon crossing the boundary.
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So the wave crests are closer to each other but the light still oscillates the same number of times per second. The refraction occurs at the boundary and is caused by a change in the speed of the light wave upon crossing the boundary. Calculate the refractive index of the medium.
For example for visible light the refractive index of glass is typically around 15 meaning that light in glass travels at c 15 200 000 kms 124 000 mis.
Velocity of light in crown glass. The refraction occurs at the boundary and is caused by a change in the speed of the light wave upon crossing the boundary. Than the normal it changes speed wavelength. Light at this angle would have the longest possible path of 1cos482.
