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MHT CET20192 May 2019Morning ShiftPhysicsWave OpticsActual

In baptism experiment, the distance between source and eyepiece is 1.2 m , the distance between two virtual sources is 0.84 m m . Then, the wavelength of light used if eyepiece is to be moved transverselythrough a distance of 2.799 c m to shift 30 fringes is

Options

  1. A6533 Å
  2. B6537 Å
  3. C6535 Å
  4. D6351 Å

Correct answer

D. 6351 Å

Step-by-step solution

y = n . λ D d 2.799 × 10 - 2 = 30 λ 1.2 0.84 × 10 - 3 ⇒ λ = 6351 Å

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