Question

What is refractive index
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Answer 1

hey mate here is your answer....

In optics, the refractive index 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

Explanation:sin i/sin r = constant actually this constant is nothing but the refractive index.the refractive index of a material is a dimensionless number that describes how fast light travels through the material.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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