another name for photocell
An electronic device having an electrical output that varies in response to the strength of incident electromagnetic radiation, especially visible light. Photoelectric cells make use of the photoelectric effect, in which electrons are displaced by photons in substances such as silicon or selenium to generate a voltage in response to radiation. Photoelectric cells are used to detect light electronically in cameras and night vision apparatus and to generate electrical power in solar cells. Also called photovoltaic cell. See also solar cell.
noun, Physics. 1. .
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 […]
[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