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COMEDK20269 May 2026Morning ShiftChemistryStructure of AtomActual

In the photoelectric emission, the energy of the emitted electron is:

Options

  1. Agreater than the energy of the incident photon
  2. Bproportional to the intensity of the incident photon
  3. Csame as that of the incident photon
  4. Dsmaller than the energy of the incident photon

Correct answer

D. smaller than the energy of the incident photon

Step-by-step solution

According to Einstein's photoelectric equation, the maximum kinetic energy of the emitted electron is given by: K_ = E - where E is the energy of the incident photon and is the work function of the material. Since the work function is always positive for any material, the maximum kinetic energy K_ is strictly less than the energy of the incident photon E . The actual kinetic energy of an emitted electron ranges from 0 to K_ . Therefore, the energy of the emitted electron is always smaller than the energy of the inc

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