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KCET2012PhysicsWave Optics

If the two slits in Young's double slit experiment are of unequal width, then

Options

  1. Athe dark fringes are not perfectly dark
  2. Bthe bright fringes will have unequal spacing
  3. Cthe bright fringes will have unequal brightness
  4. Dthe fringes do not appear

Correct answer

A. the dark fringes are not perfectly dark

Step-by-step solution

If I₁ I₂ , then minimum energy of the interference pattern, I_ = ( I₁ - I₂ )² is not zero. Hence, dark fringes are not perfectly dark.

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