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MHT CET202124 Sep 2021Evening ShiftPhysicsWave OpticsActual

The path difference between two interfering light waves meeting at a point on the screen is ( 57 2 ) . The band obtained at that point is

Options

  1. A29^ th bright band
  2. B57^ th dark band
  3. C57^ th bright band
  4. D29^ th dark band

Correct answer

D. 29^ th dark band

Step-by-step solution

Path difference = 57 2 =28.5 Since the path difference is not an integral multiple of , it is not a bright bond. Path difference for n th dark band is given by (n- 1 2 ) Hence n =29 .

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