Question

State the laws of refraction of light . Explain the term absolute refractive index of a medeum and write an expression to relate it with the speed of light in vacuum

Answer 1

The law of reflection states that the incident ray, the reflected ray, and the normal to the surface of the mirror all lie in the same plane. Furthermore, the angle of reflection is equal to the angle of incidence .Both angles are measured with respect to the normal to the mirror.
Absolute refractive index of a medium is defined as the ratio of the velocity of light in vacuum to the velocity of light in the medium. If c is the velocity of light in vacuum and v in the medium, then n = c/v.