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In a Young's double slit experiment, three polarizers are kept as shown in the figure. The transmission axes of P₁ and P₂ are orthogonal to each other. The polarizer P₃ covers both the slits with its transmission axis at 45^ to those of P₁ and P₂ . An unpolarized light of wavelength and intensity I₀ is incident on P₁ and P₂ . The intensity at a point after P₃ where the path difference between the light waves from s₁

Options

  1. AI₀ 2
  2. BI₀ 4
  3. CI ₀ 3
  4. DI₀

Correct answer

B. I₀ 4

Step-by-step solution

after passing through third poleriser, Intensity of both the waves must be I ₀ 4 now, at a point where path diff is 3 , phase difference aligned & =2 ~K ( x )= 2 3 & I _ res = ( I ₀ 4 )^2+ ( I ₀ 4 )^2+2 ( I ₀ 4 )^2 2 3 & = I ₀ 4 aligned

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