STANDARD Physics Polarization MCQ Question
When the angle of incidence is 60° on the surface of a glass slab, it is found that the reflected ray is completely polarized. The velocity of light in glass is
√2 × 10⁸ m s⁻¹
√3 × 10⁸ m s⁻¹
2 × 10⁸ m s⁻¹
3 × 10⁸ m s⁻¹
Correct Answer
Detailed Explanation
As reflected light is completely polarized, iₚ = 60°. Using Brewster's law, μ = tan iₚ = √3. Therefore, v = c/μ = 3 × 10⁸/√3 = √3 × 10⁸ m s⁻¹.
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