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KCET2017PhysicsWave Optics

In Young's double-slit experiment if yellowlight is replaced by blue light, the interferencefringes become

Options

  1. Awider
  2. Bnarrower
  3. Cbrighte!
  4. Ddarker

Correct answer

B. narrower

Step-by-step solution

In Young's double slit experiment if yellow light is replacedby blue light then the interference fringes will become narrower. We know fringe width is ( = D d ) ( ) Wavelength of yellow light ( > ) Wavelength of blue light Therefore, fringe width will decrease.

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