Question

State the laws of refraction of light. If the speed of light in vacuum is 3x108 ms-1, find the speed of light in a medium of absolute refractive index 1.5

Answer 1

1. Speed of light in vacuum = 3 x 10 ^8
2. Refractive index = 1.5

1.5 = 3 *10^8 /x    (x here stands for the speed of light in a medium )

X = 3*10^8/1.5

X=2*10^8

Answer 2

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