NEET2017Physics-Optics
NEET 2017 Physics Polarization MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Two polaroids P₁ and P₂ are placed with their axis perpendicular to each other. Unpolarised light I₀ is incident on P₁. A third polaroid P₃ is kept in between P₁ and P₂ such that its axis makes an angle 45° with that of P₁. The intensity of transmitted light through P₂ is
A
I₀/4
B
I₀/8
C
I₀/16
D
I₀/2
Correct Answer
Option B
Detailed Explanation
The intensity after P₁ is I₀/2. After P₃, it is (I₀/2) × cos²(45°) = I₀/4. After P₂, it is (I₀/4) × cos²(90°) = I₀/8.
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