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MHT CET202123 Sep 2021Morning ShiftPhysicsWave OpticsActual

A beam of light having wavelength 5400 Å from a distance source falls on a single slit 0.96 ~mm wide and the resultant diffraction pattern is observed on a screen 2 ~m away. What is the distance between the first dark fringe on either side of central bright fringe?

Options

  1. A4.8 mm
  2. B1.2 mm
  3. C2.4 mm
  4. D3.6 mm

Correct answer

C. 2.4 mm

Step-by-step solution

=5.4 10⁻⁷ ~m , D =2 ~m and a =0.96 10⁻³ ~m Distance between the dark fringes on either side of the central bright fringe = 2 D a =2.4 ~mm

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