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MHT CET202123 Sep 2021Morning ShiftPhysicsWave OpticsActual

In Yong's double slit experiment, in interference pattern, a minimum is observed exactly in front of one slit. The distance between the two coherent source is ' d ' and ' D ' is the distance between the source and screen. The possible wavelength used are inversely proportional to

Options

  1. AD , 5 D , 9 D
  2. BD , 3 D , 5 D
  3. C3 D , 4 D , 5 D
  4. D3 D , 7 D , 10 D

Correct answer

B. D , 3 D , 5 D

Step-by-step solution

If x is the fringe width, then three will be a minimum in front of the slit if aligned & d 2 = x 2 , 3 x 2 , 5 x 2 , & or d = x , 3 x , 5 x . & x = d , d 3 , d 5 , & = xd D & = d ^2 D , d ^2 3 D , d ^2 5 D aligned is inversely proportional to D , 3 D , 5 D

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