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COMEDK2016PhysicsWave Optics

In an interference experiment, intensity ratio at the bright to dark fringe is 9: 1 . Amplitudes of interfering waves are in the ratio

Options

  1. A3: 1
  2. B9: 1
  3. C2: 1
  4. D4: 1

Correct answer

C. 2: 1

Step-by-step solution

Given, I_ I_ = 9 1 As we know, array ll & I_ max I_ = (a₁+a₂ )² (a₁-a₂ )² = 9 1 & a₁+a₂ a₁-a₂ = 3 1 & a₁+a₂=3 a₁-3 a₂ & a₁ =2 a₂ or & a₁ a₂ =2: 1 array

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