photoelectron

Examples of photoelectron in the following topics:

• The Photoelectric Effect

  • Electrons emitted in this manner may be referred to as photoelectrons.
  • For a given metal, there exists a certain minimum frequency of incident radiation below which no photoelectrons are emitted.
  • However, if just the intensity of the incident radiation is increased, there is no effect on the kinetic energies of the photoelectrons.
  • For a given metal and frequency of incident radiation, the rate at which photoelectrons are ejected is directly proportional to the intensity of the incident light.
  • The time lag between the incidence of radiation and the emission of a photoelectron is very small, less than 10−9 second, and is unaffected by intensity changes.

• The Photoelectric Effect

  • This is called the photoelectric effect, and the electrons emitted in this manner are called photoelectrons.
  • The energy of the individual photoelectrons increased with the frequency (or color) of the light, but was independent of the intensity (or brightness) of the radiation.
  • As the frequency of the incoming light increases, each photon carries more energy, hence increasing the energy of each outgoing photoelectron.