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PhysicsJEE Main 8 Apr 2026, Shift 2·Q18·MCQ·Easy–moderate

Dual Nature of Radiation and Matter · Photoelectric effect

Let K1K_1 and K2K_2 be the maximum kinetic energies of photoelectrons emitted from a surface of a given material for the light of wavelength λ1\lambda_1 and λ2\lambda_2, respectively. If λ1=2λ2\lambda_1 = 2\lambda_2 then the work function of material is given by:
  1. (1)K2+2K1K_2 + 2K_1
  2. (2)2K2−K12K_2 - K_1
  3. (3)K1−2K2K_1 - 2K_2
  4. (4)K2−2K1K_2 - 2K_1
We corrected a printing error in the original paper

Source printed “K1K_1 and K2K_2 be the maximum kinetic energies” (“Let” missing).

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