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Manipal MET2016PhysicsWave Optics

Two sources give interference pattern which is observed on a screen, placed at a distance D from the sources. The fringe width is given as 2 W . If the distance of sources from the screen is doubled, then the fringe width will

Options

  1. Abecome W/2
  2. Bremains the same
  3. Cbecome W
  4. Dbecome 4 W

Correct answer

D. become 4 W

Step-by-step solution

Given, W₁=2 W , Fringe width, W= D d 2 W= D d When, D^ =2 DW₂= D^ d W₂= 2 D d =2 2 W=4 W

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