STANDARDPhysics-Optics
STANDARD Physics Polarization MCQ Question
Type: MCQ-conceptual-Medium-Class 12
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
A
√2 × 10⁸ m s⁻¹
B
√3 × 10⁸ m s⁻¹
C
2 × 10⁸ m s⁻¹
D
3 × 10⁸ m s⁻¹
Correct Answer
Option B
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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