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Question: Answered & Verified by Expert
Young's double slit experiment is performed in water, instead of air, then fringe width
PhysicsWave OpticsMHT CETMHT CET 2020 (19 Oct Shift 1)
Options:
  • A decreases.
  • B becomes infinite.
  • C increases.
  • D remains same.
Solution:
2492 Upvotes Verified Answer
The correct answer is: decreases.
(C)
$\mathrm{X}=\frac{\lambda \mathrm{D}}{\mathrm{d}}$
In water the wavelength $\lambda$ decreases and hence the fringe width decrease.

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