What is photoelectron... ??
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When light energy of sufficient intensity strikes on a surface of material, some electrons of the material very close to the surface, gain sufficient energy to overcome the work function of the material and are emitted from the surface with kinetic energy. These emitted electrons are called photo-electrons.
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An electron emitted from an atom by interaction with a photon, especially an electron emitted from a solid surface by the action of light.
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