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BITSAT2014PhysicsWave OpticsActual

Find the final intensity of light (I"), if the angle between the axes of two polaroids is 60^ .

Options

  1. A3 I ₀ 2
  2. BI ₀ 2
  3. CI ₀ 4
  4. DI ₀ 8

Correct answer

D. I ₀ 8

Step-by-step solution

From the first polaroid I ^ = I ₀ 2 From second polaroid aligned I ^ &= I ^ ² = I ₀ 2 ² (60^ ) &= I ₀ 2 ( 1 2 )²= I ₀ 8 aligned

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