photoelectric
111photoelectric cell — pho|to|e|lec|tric cell [ ,foutouı,lektrık sel ] noun count 1. ) a piece of equipment that reacts to light and is used in machines such as BURGLAR ALARMS (=machines that make a loud noise if a thief tries to get into a building) 2. ) a piece of… …
112photoelectric effect — transfer of energy from light rays that touch the electrons in a substance …
113Photoelectric Cell — A device for measuring light intensity that works by converting light falling on, or reach it, to electricity, and then measuring the current; used in photometers …
114photoelectric cell — noun (C) 1 an electronic instrument that changes light into electricity 2 an electronic instrument that uses light to start an electrical effect, often used in burglar alarms …
115photoelectric cell — G R Carey …
116photoelectric cell — pho′toelec′tric cell′ n. elo photocell • Etymology: 1890–95 …
117photoelectric effect — /ˌfoʊtoʊəˌlɛktrɪk əˈfɛkt/ (say .fohtohuh.lektrik uh fekt) noun 1. the emission of photoelectrons from a substance subjected to ultraviolet, X ray or gamma ray; electromagnetic radiation. 2. any effect whereby electrons in a substance gain energy… …
118photoelectric cell — noun a transducer used to detect and measure light and other radiations • Syn: ↑photoconductive cell, ↑photocell, ↑electric eye, ↑magic eye • Hypernyms: ↑transducer, ↑detector, ↑sensor, ↑ …
119photoelectric emission — noun the release or absorption of quanta above a certain energy level • Hypernyms: ↑emission * * * noun : photoemission …
120photoelectric current — noun : photocurrent * * * Physics. photocurrent. [1875 80] …