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Terms
  • photocathode An electrode used to release photoelectric emission when irradiated, making it then the irradiated negative electrode of a phototube.
  • phototube An electron tube having a photocathode for the emission of a photoelectric current.
  • photoelectric effect The emission of an electron from a surface that occurs when a photon impinges upon the surface and is absorbed. This effect is the means by which photons may be detected.
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