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MHT CET202313 May 2023Morning ShiftPhysicsWave OpticsActual

In a biprism experiment, monochromatic light of wavelength ' ' is used. The distance between two coherent sources ' d ' is kept constant. If the distance between slit and eyepiece ' D ' is varied as D₁, D₂, D₃ & D₄ and corresponding measured fringe widths are Z₁, Z₂, Z₃ and Z₄ then

Options

  1. AZ ₁ D ₁= Z ₂ D ₂= Z ₃ D ₃= Z ₄ D ₄
  2. BZ₁ D₁ = Z₂ D₂ = Z₃ D₃ = Z₄ D₄
  3. CD ₁ Z ₁ = D ₂ Z ₂ = D ₃ Z ₃ = D ₄ Z ₄
  4. DZ₁ D₁ =Z₂ D₂ =Z₃ D₃ =Z₄ D₄

Correct answer

B. Z₁ D₁ = Z₂ D₂ = Z₃ D₃ = Z₄ D₄

Step-by-step solution

Fringe width Z= D d Z D = d = constant, as and d are constant Z₁ D₁ = Z₂ D₂ = Z₃ D₃ = Z₄ D₄

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