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JEE Main20207 Jan 2020Morning ShiftPhysicsWave OpticsActual

A polarizer - analyser set is adjusted such that the intensity of light coming out of the analyser is just 36 % of the original intensity. Assuming that the polarizer - analyser set does not absorb any light, the angle by which the analyser needs to be rotated further, to reduce the output intensity to zero, is sin - 1 3 5 = 37 °

Options

  1. A53 o
  2. B37 o
  3. C90 o
  4. D45 o

Correct answer

B. 37 o

Step-by-step solution

I = I 0 c o s 2 θ 0 . 36 I 0 = I 0 cos 2 θ cos θ = 3 5 ⇒ θ = 53 ° angle rotated should be = 90 o - 53 o = 37 o

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