Question

State the laws of reflection of light not explain the term absolute refractive index of a medium and write an expression to relate it with the speed of light in vacuum

Answer 1

First Law of Refraction

The incident ray, refracted ray and normal to the interface at the point of incidence lie in the same plane.

Second Law of Refraction

The sine of angle of incidence bears a constant ratio with sine of angle of refraction for a given pair of media.

sin i / sin r = constant

Absolute refractive index of a medium

Absolute Refractive Index of a medium = Speed of light in air or vacuum / Speed of light in the medium