photoelectric tube
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photoelectric tube — noun : phototube * * * Electronics. phototube … Useful english dictionary
tube — I (New American Roget s College Thesaurus) n. pipe, hose, conduit; tunnel, subway; slang, television. See passage. II (Roget s IV) n. 1. [A hollow cylinder] Syn. conduit, hose, test tube, tubing, tunnel, loom, subway; see also pipe 1 . 2. [A… … English dictionary for students
photoelectric effect — Physics. 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. Also called photoemission. [1890 95] * * *… … Universalium
Photoelectric effect — The photoelectric effect is a quantum electronic phenomenon in which electrons are emitted from matter after the absorption of energy from electromagnetic radiation such as x rays or visible light.cite book | title = Physics for Scientists… … Wikipedia
photoelectric cell — Electronics. photocell. [1890 95] * * * ▪ electronics also called Electric Eye, Photocell, or Phototube, an electron tube with a photosensitive cathode that emits electrons when illuminated and an anode for collecting the emitted… … Universalium
Video camera tube — In older video cameras, before the mid to late 1980s, a video camera tube or pickup tube was used instead of a charge coupled device (CCD) for converting an optical image into an electrical signal. Several types were in use from the 1930s to the… … Wikipedia
electron tube — an electronic device that consists, typically, of a sealed glass bulb containing two or more electrodes: used to generate, amplify, and rectify electric oscillations and alternating currents. Also called electronic tube. Cf. gas tube, vacuum tube … Universalium
Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… … Wikipedia
image tube — noun a photoelectric device for intensifying faint astronomical images … Wiktionary
phototube — /foh teuh toohb , tyoohb /, n. Electronics. an electron tube with a photosensitive cathode, used like a photocell. Also called photoelectric tube. [1925 30; PHOTO + TUBE] * * * … Universalium
