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MHT CET202522 Apr 2025Morning 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

Single-slit diffraction produces a pattern where light waves bend around obstacles or spread after passing through a narrow aperture. The central maximum has angular width 2 /a , while secondary maxima each have width /a , establishing unequal fringe widths. Intensity distribution shows the central maximum as brightest, with secondary maxima intensities decreasing rapidly—the first secondary maximum is approximately 4.5 % of the central intensity. This confirms unequal intensities. Option D claims fringes have equa

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