Photoelectric-threshold
noun, Physics.
1.
the minimum frequency or maximum wavelength of incident radiation necessary to release photons from a given surface.
Read Also:
- Photoelectric-meter
noun, Photography. 1. an exposure meter using a photocell for the measurement of light intensity.
- Photoelectric-tube
noun, Electronics. 1. . [foh-tuh-toob, -tyoob] /ˈfoʊ təˌtub, -ˌtyub/ noun, Electronics. 1. an with a photosensitive cathode, used like a photocell. /ˈfəʊtəʊˌtjuːb/ noun 1. a type of photocell in which radiation falling on a photocathode causes electrons to flow to an anode and thus produce an electric current
- Photoelectron
[foh-toh-i-lek-tron] /ˌfoʊ toʊ ɪˈlɛk trɒn/ noun, Physics. 1. an emitted from a system by the photoelectric effect. /ˌfəʊtəʊɪˈlɛktrɒn/ noun 1. an electron ejected from an atom, molecule, or solid by an incident photon photoelectron (fō’tō-ĭ-lěk’trŏn’) An electron released or ejected from a photoelectric substance, having absorbed energy from incoming light.
- Photoelectrotype
[foh-toh-i-lek-truh-tahyp] /ˌfoʊ toʊ ɪˈlɛk trəˌtaɪp/ noun 1. an made by photographic means. /ˌfəʊtəʊɪˈlɛktrəʊˌtaɪp/ noun 1. an electrotype mode using photography
- Photoemission
[foh-toh-i-mish-uh n] /ˌfoʊ toʊ ɪˈmɪʃ ən/ noun, Physics. 1. . /ˌfəʊtəʊɪˈmɪʃən/ noun 1. the emission of electrons due to the impact of electromagnetic radiation, esp as a result of the photoelectric effect photoemission (fō’tō-ĭ-mĭsh’ən) See photoelectric effect.