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MHT CET Medical202621 April 2026Evening ShiftPhysicsWave OpticsActual

In a single slit diffraction pattern, identify the incorrect statement from the following

Options

  1. AThe fringes have unequal width.
  2. BThe fringes have unequal intensity.
  3. CThe fringes have unequal width and unequal intensity.
  4. DThe fringes have equal width and equal intensity.

Correct answer

D. The fringes have equal width and equal intensity.

Step-by-step solution

In a single slit diffraction pattern, the central maximum has an angular width of 2 a , whereas the secondary maxima have an angular width of a . Thus, the fringes have unequal widths. The intensity of the central maximum is maximum, and the intensity of the successive secondary maxima decreases rapidly (approximately I₀ 22 , I₀ 61 , etc.). Thus, the fringes have unequal intensities. Therefore, the statement that the fringes have equal width and equal intensity is incorrect. Answer: The fringes have equal width and

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