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NEET 2024
Exam
NEET
Year
2024
Subject
Physics
Chapter
Wave Optics

NEET 2024 · Physics · Wave Optics

If the monochromatic source in Young's double slit experiment is...

If the monochromatic source in Young's double slit experiment is replaced by white light, then

Options

  1. AThere will be a central dark fringe surrounded by a few coloured fringes
  2. BThere will be a central bright white fringe surrounded by a few coloured fringes
  3. CAll bright fringes will be of equal width
  4. DInterference pattern will disappear

Correct answer

B. There will be a central bright white fringe surrounded by a few coloured fringes

Step-by-step solution

At central point on screen, path difference is zero for all wavelength. So, central bright fringe is white and other fringes depend on wavelength as β=λDd\beta=\frac{\lambda D}{d}. Therefore, other fringes will be coloured.
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