Light enters from air to diamond which has a refractive index of 2.42. Calculate the speed of light in diamond. The speed of light in air is 3.00×108m/s.

Given,

Refractive index of diamond = 2.42 Speed of light in air = 3.00×108m/s

Refractive index of diamond = speed of light in air/speed of light in diamond Speed of light in diamond = 1.239×108m/s