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AP EAMCET202125 Aug 2021Morning ShiftPhysicsWave OpticsActual

The ratio of maximum and minimum intensities in an interference pattern is 36: 1 . The ratio of the amplitude of the two interfering waves will be

Options

  1. A5: 7
  2. B7: 4
  3. C4: 7
  4. D7: 5

Correct answer

D. 7: 5

Step-by-step solution

I_ I_ = 36 1 We know, I_ = (a+a₂ )^2 array rlrl I_ & = (a₁-a₂ )^2 & & (a₁+a₂ )^2 (a₁-a₂ )^2 & = 36 1 a₁+a₂ a₁-a₂ = 6 1 & & a₁+a₂ & =6 a₁-6 a₂ & & 5 a₁ & =7 a₂ array The ratio of amplitude, a₁ a₂ = 7 5

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