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Wave Optics question

2018 · 16 Apr · Shift 1 · Q51
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Wave Optics question

2018 · 16 Apr · Shift 1 · Q51

JEE MainPhysicsWave OpticsMCQ+4 / −1
Unpolarized light of intensity I is incident on a system of two polarizers, A followed by B. The intensity of emergent light is I/2. If a third polarizer C is placed between A and B, the intensity of emergent light is reduced to I/3. The angle between the polarizers A and C is θ\thetaθ. Then :
  1. A
    cos θ\thetaθ=(23)12{\left( {{2 \over 3}} \right)^{\frac{1}{2}}}(32​)21​
  2. B
    cos θ\thetaθ=(23)14{\left( {{2 \over 3}} \right)^{\frac{1}{4}}}(32​)41​
  3. C
    cos θ\thetaθ=(13)12{\left( {{1 \over 3}} \right)^{\frac{1}{2}}}(31​)21​
  4. D
    cos θ\thetaθ=(13)14{\left( {{1 \over 3}} \right)^{\frac{1}{4}}}(31​)41​
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