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A light source of wavelength illuminates a metal surface and electrons are ejected with maximum kinetic energy of 2 eV . If the same surface is illuminated by a light source of wavelength 2 , then the maximum kinetic energy of ejected electrons will be (The work function of metal is 1 eV )

Options

  1. A3 eV
  2. B2 eV
  3. C6 eV
  4. D5 eV

Correct answer

D. 5 eV

Step-by-step solution

Einstein's photoelectric equation aligned & KE = h c = ₀ & 2 eV = h c -1 eV & h c =3 eV & KE ^ = h c ( / 2) - ₀=6 eV -1 eV aligned =5 eV

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