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A polarized light of intensity I 0 is passed through another polarizer whose pass axis makes an angle of 60 o with the pass axis of the former. What is the intensity of emerging polarized light from second polarizer?

Options

  1. AI = I 0
  2. BI = I 0 6
  3. CI = I 0 5
  4. DI 0 4

Correct answer

D. I 0 4

Step-by-step solution

By Malus law, I = I 0 cos 2 ⁡ θ (I = Intensity of emergent polarized light) Where θ = 60 o , I = ? = I 0 × cos 2 ⁡ 60 o ( I 0 = Intensity passed through polarizer) = I 0 × 1 2 2 = I 0 4

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