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MHT CET20239 May 2023Morning ShiftPhysicsWave OpticsActual

A beam of unpolarized light passes through a tourmaline crystal A and then it passes through a second tourmaline crystal B oriented so that its principal plane is parallel to that of A. The intensity of emergent light is I ₀ . Now B is rotated by 45^ about the ray. The emergent light will have intensity ( 45^ = 1 2 )

Options

  1. AI₀ 2
  2. BI₀ 2
  3. C2 I₀
  4. D2 I₀

Correct answer

A. I₀ 2

Step-by-step solution

Using law of Malus, aligned I & = I ₀ ^2 & = I ₀ ( ^2 45 ) & = I ₀ ( 1 2 )^2 & = I ₀ 2 aligned

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