Question

what is a refractive index

Answer 1

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It is defined as ratio of sine of angle incidence to the Sine of angle of reflection.

It is also defined as the ratio of speed of light in a given pair of medium.

$n = \frac{v1}{v2}$
where,
V1 = Velocity of light in medium 1
V2 = Velocity of light in medium 2



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Answer 2

Answer:

Refraction Index :- It is defined as the ratio of velocity of life in vaccum to the velocity of light in a substance at same wave length.

It is dependent on the colour of light travelling through the medium.

Also depending on the density of the medium.

Explanation:

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