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.
the ejection of electrons from a solid by an incident beam of sufficiently energetic electromagnetic radiation
any phenomenon involving electricity and electromagnetic radiation, such as photoemission
The emission of electrons from a material, such as a metal, as a result of being struck by photons. Some substances, such as selenium, are particularly susceptible to this effect. The photoelectric effect is used in photoelectric and solar cells to create an electric potential. Also called photoemission.
The emission of electrons from a metal when light shines on it. The effect is widely used to convert a light signal into an electric current.
[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
noun, Physics. 1. the minimum frequency or maximum wavelength of incident radiation necessary to release photons from a given surface.
noun, Photography. 1. an exposure meter using a photocell for the measurement of light intensity.