In the photoelectric effect, what happens to the energy of the incident photon i

Practice Questions

Q1
In the photoelectric effect, what happens to the energy of the incident photon if it exceeds the work function?
  1. All energy is used to emit electrons
  2. Excess energy becomes kinetic energy
  3. No electrons are emitted
  4. Energy is lost as heat

Questions & Step-by-Step Solutions

In the photoelectric effect, what happens to the energy of the incident photon if it exceeds the work function?
  • Step 1: Understand that a photon is a particle of light that carries energy.
  • Step 2: Know that the work function is the minimum energy needed to remove an electron from a material.
  • Step 3: If the energy of the incoming photon is greater than the work function, it can free an electron.
  • Step 4: The energy of the photon is used to overcome the work function first.
  • Step 5: Any energy left over after overcoming the work function becomes the kinetic energy of the emitted electron.
  • Step 6: This means the faster the electron moves, the more excess energy it has.
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