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Question: Answered & Verified by Expert
In a Young's double slit experiment two slits are separated by 2 mm and the screen is placed one meter away. When a light of wavelength 500 nm is used, the fringe separation will be :
PhysicsWave OpticsJEE MainJEE Main 2021 (26 Feb Shift 1)
Options:
  • A 1 mm
  • B 0.50 mm
  • C 0.75 mm
  • D 0.25 mm
Solution:
1252 Upvotes Verified Answer
The correct answer is: 0.25 mm

β=λDd=500×10-9×12×10-3

β=52×10-4 m=2.5×10-1 mm

b=0.25 mm

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