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MHT CET202014 Oct 2020Morning ShiftPhysicsWave OpticsActual

A double slit experiment is immersed in water of refractive index 1 33 . The slit separation is 1 ~mm , distance between slit and screen is 1 33 ~m . The slits are illuminated by a light of wavelength 6300 Å . The fringewidth is

Options

  1. A6.9 10⁻⁴ ~m
  2. B6.3 10⁻⁴ ~m
  3. C5 8 10⁻⁴ m
  4. D8.6 x 10⁻⁴ ~m

Correct answer

B. 6.3 10⁻⁴ ~m

Step-by-step solution

fringe width =X= _ W D d _ w = 6.3 10⁻⁷ 1.33 , D=1 ~m , ~d =10⁻³ ~m [on substituting and solving ] X=6.3 10⁻⁴ ~m

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