Calculate the angle of incidence of light ray incident on surface of a plastic slab of refractive index root over 3 , if the angle of refraction is 30 degree.

Question

the angle of prism is A .one of its refraction surface is silvered . light Ray falling angle 2A on the first surface return back through same path after reflection surface refractive index ?

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Answer 1

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, angle of incidence is 60 degrees

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Calculate the angle of incidence of light ray incident on surface of a plastic slab of refractive index root over 3 , if the angle of refraction is 30 degree.

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