Question

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What is refractive index ?

How is the refractive index of a medium related to the speed of light ? Obtain an expression for the refractive index of a medium with respect to another in terms of speed of light in these two medias.

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Answer 1

Answer:

In optics, the refractive index (also known as refraction 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

n = c/u

Explanation:

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Answer 2

Answer:

ANS by @Mohib

hope it will help you

Explanation:

refractive index :

It is a measure of transparency of a medium for light passage through it.

relation with speed of light :

refractive index=speed of light in air/

speed of light in medium

Obtain an expression for the refractive index of a medium with respect to another in terms of speed of light in these two medias :

Let v1 and v2 is the speed of light in medium 1 and medium 2 respectively.

Hence,

The refractive index of medium 1= c/v1

The refractive index of medium 2= c/v2

So, The refractive index of medium 2 with respect to medium 1 is given by ,

n21= n2/n1

hence , n21= v1/v2

- @Mohib