Q5 of 84 Page 296

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°.

Given;

Angle of refraction(r) = 300.


Angle of incidence = i.


Refractive index (μ) = √3.


Refractive index (μ) =


⇒ √3 =


⇒ √3 = 2×sin i


⇒


⇒


Hence angle of incidence is 60°.


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