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Manipal MET2017PhysicsWave Optics

Two coherent sources of intensity ratio 9: 4 produce interference. What is the ratio between maxima and minima in the interference pattern produced?

Options

  1. A3: 2
  2. B25: 1
  3. C13: 5
  4. D5: 1

Correct answer

D. 5: 1

Step-by-step solution

Intensity (I=k a^2 ) , where a is amplitude and k is a constant. array ll & I₁=k a₁^2 & I₁ I₂ = a₁^2 a₂^2 = 9 4 & a₁ a₂ = 3 2 array Maximum intensity aligned I_ & = (a₁+a₂ ) & =(3+2)=5 aligned Minimum intensity I_ = (a₁-a₂ )=(3-2)=1 I_ I_ = 5 1

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