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The intensity ratio of two coherent sources of light is P . They are interfering in the same region and produce an interference pattern. Then the fringe visibility is

Options

  1. A1 + P 2 P
  2. B2 P 1 + P
  3. CP 1 + P
  4. D2 P 1 + P

Correct answer

B. 2 P 1 + P

Step-by-step solution

Visibility, V = I m a x - I m i n I m a x + I m i n = 2 I 1 I 2 I 1 + I 2 = 2 I 1 I 2 I 1 I 2 + 1 = 2 P P + 1

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