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Question: Answered & Verified by Expert
If the source of light used in a Young's double slit experiment is changed from red to violet:
PhysicsWave OpticsJEE MainJEE Main 2021 (24 Feb Shift 2)
Options:
  • A consecutive fringe lines will come closer.
  • B the fringes will become brighter.
  • C the central bright fringe will become a dark fringe.
  • D the intensity of minima will increase.
Solution:
2965 Upvotes Verified Answer
The correct answer is: consecutive fringe lines will come closer.

β=λ·Dd

λR>λV

βR=λRDd and βV=λVDd

βR>βV

Fringe pattern will shrink.

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