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KCET2016PhysicsWave Optics

In Young's double slit experiment the source is white light. One slit is covered with red filter and the other with blue filter. There shall be

Options

  1. AAlternate red & blue fringes
  2. BAlternate dark & pink fringes
  3. CAlternate dark & yellow fringes
  4. DNo interference

Correct answer

D. No interference

Step-by-step solution

The conditions for interference are as follows: Source mustbe coherent, that is, they should have same wavelength and constant phase difference. The light must be monochromatic. Thus, if a white light used as source and one slit is covered with red filter and other with blue filter then red light and blue light will interfere but the conditions of interference are not satisfied so there will be no interference.

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