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In the YDSE arrangement shown here, the intensity on the screen due to slit-2 is four times that of slit-1. If resultant intensity at the position of central maxima O is I , the resultant intensity at point P, where the phase difference between two waves coming from two slits is cos -1 1 4 is

Options

  1. AI 3
  2. B2 I 3
  3. CI 4
  4. DI 2

Correct answer

B. 2 I 3

Step-by-step solution

I = I 0 + 4 I 0 2 = 9 I 0 I 0 = I g I ′ = I 0 + 4 I 0 + 2 I 0 . 4 I 0 × 1 4 = 6 I 0 = 2 3 I

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