Question

What is refractive index

Answer 1

$\huge\blue{Answer}$

The ratio of speed of light in the two mediums i.e., vaccum and air is known as refractive index.

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Answer 2

Explanation:

In optics, the refractive index or index of refraction of a material is a dimensionless number that describes how fast light propagates through the material. It is defined as

c

n = ---

v

where c is the speed of light in vacuum and v is the phase velocity of light in the medium. For example, the refractive index of water is 1.333, meaning that light travels 1.333 times as fast in vacuum as in water.

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