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MHT CET202411 May 2024Morning ShiftPhysicsWave OpticsActual

In Fraunhofer diffraction pattern, slitwidth is 0.5 mm and screen is at 2 m away from the lens. If wavelength of light used is 5500 Å , then the distance between the first minimum on either side of the central maximum is ( is small and measured in radian)

Options

  1. A1.1 mm
  2. B2.2 ~mm
  3. C4.4 mm
  4. D5.5 mm

Correct answer

C. 4.4 mm

Step-by-step solution

Distance of 1^ st minima from central maxima y_ 1 d = D a Distance between two minima on either side of the central maxima is 2 y _ 1 ~d = 2 D a = 2 5500 10⁻¹⁰ 2 0.5 10⁻³ =4.4 ~mm

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