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PhysicsJEE Main 8 Apr 2026, Shift 2·Q13·MCQ·Easy–moderate

Dual Nature of Radiation and Matter · Photoelectric effect

A monochromatic source of light operating at 15 kW emits 2.5×10222.5\times10^{22} photons/s. The region of an electromagnetic spectrum to which the emitted electromagnetic radiation belongs is . (Take h=6.6×10−34h = 6.6\times10^{-34} J.s and c=3×108c = 3\times10^{8} m/s).
  1. (1)Microwave
  2. (2)Infrared
  3. (3)Visible
  4. (4)Ultraviolet
We corrected a printing error in the original paper

Source printed “to which the emitted electromagnetic radiation belongs to”.

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