What is the velocity of light in glass. Whether it differs from its velocity in air.?
The velocity of light is slower than its velocity in air or in vacuum. The velocity of light in air is approx. 3*10^8 m/s And its velocity in glass is 1.5*10^8 m/s. It is exactly half the velocity in air. The velocity of the light depends on the refrective index of the medium through which the light travels.
