Photoelectricity

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  • Created by: izzy
  • Created on: 06-06-13 19:35

Photoelectric effect

A metal contains conduction electrons, which move about freely inside the metal. These electrons collide with each other and with positive ions of the metal. When Hertz discovered how to produce and detect radio waves, he found that the sparks produced in his spark gap detector when radio waves were being transmitted were stronger when unltraviolet radiation was directed at the spark gap. Further investigations on the effect of electromagnetic radiation on metals showed that electrons are emittedd from the surface of a metal when electromagnetic radiation above a certain frequency was dirrected at the metal. This effect is known as the

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