Question

What is the index of refraction?

Answer 1

Answer:

Description

DescriptionDescriptionIn 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.

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Answer 2

it can be calculated by SPEED OF LIGHT IN VACCUUM / SPEED OF LIGHT IN THAT MEDIUM .............

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DEFINITION GIVEN BY THE OTHER ONE ........