. State the laws of refraction of light. Give an expression to relate the absolute refractive index of a medium with speed of light in va

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Ans. There are two laws of refraction of light.

(i) The first law of refraction of light states that the incident ray, the refracted ray and the normal at the point of incidence, all lie in the same plane.

(ii) The second law is refraction of light is the snell’s law of Refraction. It states  that  the  ratio  of sine  of the angle of incidence to the sine of angle of refraction is a constant. for a given pair of medium