When unpolarized light is incident on a transparent medium of refractive index at Brewster's angle, what is the angle of refraction?
Answer and explanation
Correct answer: A.
- Step 1: By Brewster's law, polarizing angle satisfies .
- Step 2: At Brewster's incidence, reflected and refracted rays are perpendicular: .
- Step 3: Angle of refraction is .
Answer
.
Why not the others: is the angle of incidence; applies to ; and would mean no penetration into the medium.
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