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°.