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KCET2018PhysicsWave Optics

In a Fraunhofer diffraction at a single slit, if yellow light illuminating the slit is replaced by blue light, then diffraction bands

Options

  1. ARemains unchanged
  2. BBecome wider
  3. CDisappear
  4. DBecome narrower

Correct answer

D. Become narrower

Step-by-step solution

As we know Wavelength of yellow light ( > ) Wavelength of blue light Therefore, if yellow light used in illuminating the slit is replaced by blue light then the diffraction bands will become narrower.

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