Question

what is mean by refractive index​

Answer 1

⎝⎝⫸⫷ANSWER⫸⫷⎠⎠

Refractive index, also called index of refraction, measure of the bending of a ray of light when passing from one medium into another. ... Refractive index is also equal to the velocity of light c of a given wavelength in empty space divided by its velocity v in a substance, or n = c/v.

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Answer 2

It is defined as the ratio of the velocity of light in a vacuum to the velocity of light in a material.