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MHT CET202121 Sep 2021Morning ShiftPhysicsWave OpticsActual

In biprism experiment, 21 fringes are observed in a given region using light of wavelength 480 Å . If light of wavelength 560 Å is used, the number of fringes in the same region will be

Options

  1. A18
  2. B24
  3. C14
  4. D21

Correct answer

A. 18

Step-by-step solution

n ₁ ₁= n ₂ ₂ 21 ₁ D d = n ₂ ₂ D d n ₂=21 ₁ ₂ = 21 480 560 =18

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