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AP EAMCET2010PhysicsWave Optics

Two coherent sources whose intensity ratio is 64: 1 produce interference fringes. The ratio of intensities of maxima and minima is

Options

  1. A9: 7
  2. B8: 1
  3. C81: 49
  4. D81: 7

Correct answer

C. 81: 49

Step-by-step solution

The ratio of intensities of maxima and minima I_ I_ = ( I₁ + I₂ )^2 ( I₁ - I₂ )^2 = ( 64 + 1 )^2 ( 64 - 1 )^2 I_ I_ = (8+1)^2 (8-1)^2 = 81 49

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