Question

Light enter from air to diamond, which has a refractive index2.42. What is the speed of light in diamond?

For XIII class CBSE.

Answer 1

Velocity of speed of light V
Velocity inversely proporational to refractive index

V diamond          Mu air
-------------      =  ------------------    = 1 / Mu diamond
V air                  Mu diamond
Vel of light in diamond = 3 * 10 ^8 / 2.42 = 1.24 * 10^8 m/s