Question

The speed of light in vacuum is 3 × 10⁸ m/s. If the speed of light in a medium is 2.25 × 10⁸ m/s, the absolute refractive index of the medium is :

State two laws of refraction of light.

Define the term absolute refractive index of a medium. A ray of light enters from vacuum to glass of absolute refractive index 1.5. Find the speed of light in glass. The speed of light in vacuum is 3 × 10⁸ m/s.

Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass? The speed of light in vacuum is 3 × 10⁸ m s⁻¹.