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MHT CET 2026 (11 Apr, Shift 1) · Polarisation

Polarisation question from MHT CET 2026 (11 Apr, Shift 1)

Q7MHT CET 2026 · 11 APR · SHIFT 1Medium

Polarisation

Two polaroid A and B placed in such a way that the pass-axis of polaroid are perpendicular to each other. Now, another polaroid C is placed between A and B bisecting angle between them. If intensity of unpolarised light is I0I_0 then intensity of transmitted light after passing through polaroid B will be

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Answer: (c)

  1. C bisects the right angle, so it is at 45∘45^\circ to both A and B.
  2. I=I02cos⁡245∘cos⁡245∘=I02⋅12⋅12I = \frac{I_0}{2}\cos^2 45^\circ\cos^2 45^\circ = \frac{I_0}{2}\cdot\frac{1}{2}\cdot\frac{1}{2}
  3. So the answer is (c) I08\frac{I_0}{8}.
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