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MHT CET 2025 (19 Apr, Shift 1) · Diffraction at a Single Slit

Diffraction at a Single Slit question from MHT CET 2025 (19 Apr, Shift 1)

Q19MHT CET 2025 · 19 APR · SHIFT 1Medium

Diffraction at a Single Slit

In a Fraunhoffer diffraction, light of wavelength ' λ\lambda ' is incident on slit of width ' d '. The diffraction pattern is observed on a screen placed at a distance ' DD '. The linear width of central maximum is equal to two times the width of the slit, then 'D' has value

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Answer: (a)

  1. Linear width of central maximum =2λDd= \dfrac{2\lambda D}{d}
  2. Given 2λDd=2d\dfrac{2\lambda D}{d} = 2d
  3. So the answer is (a) D=d2λD = \dfrac{d^2}{\lambda}.
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