A ray is incident at the Brewster angle on a transparent surface. If the angle of incidence is 56°, what is the angle made by the refracted ray with the normal?
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Question

A ray is incident at the Brewster angle on a transparent surface. If the angle of incidence is 56°, what is the angle made by the refracted ray with the normal?

G1 Physics · Accepted Answer

At Brewster incidence, the reflected and refracted rays are mutually perpendicular. Therefore, i(B)+r = 90°. Given, i(B) = 56°. Hence, r = 90°−56° = 34°. Correct option: A.