Define photo electric effect

The photoelectric effect is the emission of electrons from a material when it is exposed to light of a certain frequency.

PHOTO ELECTRON

points in physics regarding the photoelectric effect:

  • Discovered by Hertz and later explained by Einstein
  • Light is seen as photons with energy, rather than a wave
  • Only occurs with light of high enough frequency
  • Electrons are emitted with a specific maximum kinetic energy
  • The photoelectric effect led to the development of quantum mechanics.