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PhysicsJEE Main 22 Jan 2026, Shift 2·Q15·MCQ·Easy–moderate

Wave Optics · Diffraction and polarisation

Which of the following are true for a single slit diffraction?
  • (A)Width of central maxima increases with increase in wavelength keeping slit width constant.
  • (B)Width of central maxima increases with decrease in wavelength keeping slit width constant.
  • (C)Width of central maxima increases with decrease in slit width at constant wavelength.
  • (D)Width of central maxima increases with increase in slit width at constant wavelength.
  • (E)Brightness of central maxima increases for decrease in wavelength at constant slit width.
  1. (1)A, C, E only
  2. (2)A, D only
  3. (3)B, D only
  4. (4)B, C only
We corrected a printing error in the original paper

Source printed option (1) as “A, D, E only”; corrected to the intended “A, C, E only” (A, C, E are the true statements; as printed no option is correct).

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