Question

what is refractive index​

Answer 1

Answer:

n optics, the refractive index or index of refraction of a material is a dimensionless number that describes how fast light travels through the material. It is defined as where c is the speed of light in vacuum and v is the phase velocity of light in the medium

Explanation:

Answer 2

Answer:

$here \: is \: your \: answer$

Explanation:

It is the ratio of the velocity of light in a vacuum to its velocity in a specified medium.

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