In Young's double slit experiment, if monochromatic light is replaced by white light

Options :
  1. all bright fringes become white
  2. all bright fringes have colours between violet and red
  3. only the central fringe is white, all other fringes are coloured
  4. no fringes are observed


Answer and Explanation :-

Answer: Option 3

Explanation:

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By: Pranjal singh On: Mar/03/2015

The interference patterns of different ccomponent colours of white light overlap (incoherently).
The central bright fringe for all the colour components lie at the same position. Therefore, the central fringe is WHITE.

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