The critical angle for an air-glass interface is 29.6°.When a light ray in air is incident on the interface,the reflected ray is 100% polarized.What is the angle of refraction of that ray?
A) 26.3°
B) 25.7°
C) 25.1°
D) 24.5°
E) 23.9°

Question

Quizplus · Accepted Answer

The angle of refraction is found using Brewster's angle, which is the angle of incidence that results in 100% polarization of the reflected light. Brewster's angle (θ_B) is related to the critical angle (θ_c) by the equation: θ_B = 90° - θ_c. Given θ_c = 29.6°, θ_B = 90° - 29.6° = 60.4°. Using Snell's law, n_air * sin(θ_B) = n_glass * sin(θ_r), and knowing n_air = 1, we find θ_r = 26.3°.

The Critical Angle for an Air-Glass Interface Is 29