Unpolarized light travelling from air falls on a transparent dielectric surface at the Brewster angle 60°. What is the refractive index of the dielectric relative to air?
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Question

Unpolarized light travelling from air falls on a transparent dielectric surface at the Brewster angle 60°. What is the refractive index of the dielectric relative to air?

G1 Physics · Accepted Answer

For incidence from air onto a dielectric, Brewster's law is μ = tan i(B). Given, i(B) = 60°. Therefore, μ = tan60° = √3. Correct option: B.