cathode-ray tube


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cathode-ray tube

cath·ode-ray tube

 (kăth′ōd-rā′)
n.
A vacuum tube, formerly used in computer monitors and televisions, that electromagnetically or electrostatically deflects a focused cathode ray toward various points on a phosphorescent screen.

cathode-ray tube

n
(General Physics) a valve in which a beam of high-energy electrons is focused onto a fluorescent screen to give a visible spot of light. The device, with appropriate deflection equipment, is used in television receivers, visual display units, oscilloscopes, etc. Abbreviation: CRT

cath′ode-ray` tube`


n.
a vacuum tube generating a focused beam of electrons, the terminus of which is visible as a luminescent spot or line on a screen at the broad end of the tube: used to display images on a television receiver or computer monitor. Abbr.: CRT
[1900–05]
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cathode-ray tube

A sealed tube in which electrons are made to escape from their atoms and move in a beam from the negatively charged end of the tube toward the positively charged end.
Did You Know? Cathode-ray tubes (also called CRTs) are the visual display units in such items as conventional television sets, computer monitors, hospital heart-monitoring devices, and laboratory oscilloscopes. They are generally made up of sealed glass tubes that have had the air drawn out of them. At one end of the tube is a phosphor-coated screen, and at the other end is an electron "gun." The gun is a cathode (in this case a negative electrode). It directs a beam of electrons, also called a cathode ray, toward the screen. Coils outside the tube create magnetic fields that steer the beam on its way toward the screen. When the beam strikes the screen, it causes the phosphors to glow, producing an image.

cathode-ray tube

A vacuum tube and cathode forming the picture tube in television receivers.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cathode-ray tube - a vacuum tube in which a hot cathode emits a beam of electrons that pass through a high voltage anode and are focused or deflected before hitting a phosphorescent screen
Crookes tube - the original gas-discharge cathode-ray tube
electron gun - the electrode that is the source of electrons in a cathode-ray tube or electron microscope; consists of a cathode that emits a stream of electrons and the electrostatic or electromagnetic apparatus that focuses it
gas-discharge tube - a tube in which an electric discharge takes place through a gas
kinescope, picture tube, television tube - a cathode-ray tube in a television receiver; translates the received signal into a picture on a luminescent screen
cathode-ray oscilloscope, CRO, oscilloscope, scope - electronic equipment that provides visual images of varying electrical quantities
CRT screen, screen - the display that is electronically created on the surface of the large end of a cathode-ray tube
television system, television - a telecommunication system that transmits images of objects (stationary or moving) between distant points
Translations

cathode-ray tube

[ˈkæθəʊdˌreɪˈtjuːb] n (Elec) → tubo a raggi catodici
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