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thermionic emission


from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the emission of electrons from very hot substances


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  • “The classical example of thermionic emission is the emission of electrons from a hot metal cathode into a vacuum (archaically known as the Edison effect) in a vacuum tube. However, the term "thermionic emission" is now used to refer to any thermally excited charge emission process, even when the charge is emitted from one solid-state region into another.”

    Thermionic emission. (2010, March 3). In Wikipedia, The Free Encyclopedia. Retrieved 00:42, April 8, 2010, from

    April 8, 2010