Question

Calculate the angle of incidence of light ray incident of surface of a plastic slab of refractive index √3, if the angle of refraction is 30°.

Answer 1

Answer:

Hello,

Given that,

Angle of refraction = 30 degrees = r

Refractive Index = √ 3

Let, Angle of Incidence = i

We know that,

Refractive index = sin i / sin r

So, √ 3 = sin i / sin 30

So, √ 3 = sin i / ( 1 / 2)

So, sin i = √ 3 / 2

So, i = 60 degrees

Hence, the angle of incidence is 60 degrees

Explanation:

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