Question

what is meant by refractive index of a medium

Answer 1

Definition of refractive index. : the ratio of the speed of radiation (such as light) in one medium (such as air, glass, or a vacuum) to that in another medium.

Refractive index, also called index of refraction, measure of the bending of a ray of light when passing from one medium into another.


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Answer 2

✳️Here's your answer:-
The value of constant sin i / sin r for a ray of light passing from air into a particular medium is called the refractive index of a medium. It is usually denoted by the symbol n .
The refractive index is a ratio of two similar quantities, it has no units.

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