Question

A substance has critical angle 45°for yellow light what is its refractive index

Answer 1

the correct answer is

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Answer 2

Answer:

Explanation:

Refractive index is defined as the  the ratio of the speed of radiation such as the light in one medium like glass, air or a vacuum to that in an another medium. It also describes as how the light travels through a medium. It is a dimensionless measure and defines how much a light ray can bend when it enters from one medium to another.

Refractive Index = c/v

Where c is the speed of light in a vacuum, and v is the velocity of light in the specified material. Thus for the yellow light -

μ = 1/sinic

= 1/sin45∘

= √2

Thus, the refractive index for yellow light will be √2