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JEE Main202126 Feb 2021Morning ShiftPhysicsWave OpticsActual

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 :

Options

  1. A1   mm
  2. B0 . 50   mm
  3. C0 . 75   mm
  4. D0 . 25   mm

Correct answer

D. 0 . 25   mm

Step-by-step solution

β = λ D d = 500 × 10 - 9 × 1 2 × 10 - 3 β = 5 2 × 10 - 4   m = 2 . 5 × 10 - 1   mm b = 0 . 25   mm

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