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noun, Physics.


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  • Photoelectric-effect

    noun, Physics. 1. the phenomenon in which the absorption of electromagnetic radiation, as light, of sufficiently high frequency by a surface, usually metallic, induces the emission of electrons from the surface. noun 1. the ejection of electrons from a solid by an incident beam of sufficiently energetic electromagnetic radiation 2. any phenomenon involving electricity and […]

  • Photoelectricity

    [foh-toh-i-lek-tris-i-tee, -ee-lek-] /ˌfoʊ toʊ ɪ lɛkˈtrɪs ɪ ti, -ˌi lɛk-/ noun, Physics. 1. induced by electromagnetic radiation, as in certain processes, as the photoelectric and photovoltaic effects, photoconductivity, and photoionization. 2. the branch of physics that deals with these phenomena.

  • Photoelectric magnitude

    noun 1. (astronomy) the magnitude of a star determined using a photometer plus a filter to select light or other radiation of the desired wavelength

  • Photoelectric-threshold

    noun, Physics. 1. the minimum frequency or maximum wavelength of incident radiation necessary to release photons from a given surface.

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