Question

What is the proper defination of refractive index

Answer 1

Hello Mate,

Refractive index 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.

Hope this helps you

Answer 2

Answer:

If medium 1 is vaccum or air, then the refractive index of medium 2 is considered with respect to vacuum this is called absolute refractive index of medium.

Nm = speed of light in air/ speed of light in the medium = c/v

let we can be the speed of light in medium 1 and V2 be the speed of light in medium 2 the refractive index of medium 2 with respect to medium 1 is given by the ratio of the the speed of light in medium 1 and speed of light in medium 2.

N21 = speed of light in medium 1/ speed of light in medium 2 = V1/V2

N12 = speed of light in medium 2/ speed of light in medium 1 = V2/V1

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