If light with photon energy 2eV is incident suitably on the surface of a metal…

Physics JAMB 1994

If light with photon energy 2eV is incident suitably on the surface of a metal with work function 3eV, then

  • no electron will be emitted checkmark
  • the few electrons emitted will have a maximum kinetic energy of 1eV
  • the few electrons emitted will have a maximum kinetic energy of 3eV
  • many electrons will be emitted

The correct answer is: A

Explanation

An electron can only be emitted if photon energy is equal or greater than work function of the plate
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