| 释义 |
cathode ray
cathode rayn.1. An electron emitted from the cathode of an electrical discharge tube, such as a cathode-ray tube.2. A narrow beam of such electrons.cath′ode ray`
n. a flow of electrons emanating from a cathode in a vacuum tube and focused into a narrow beam. [1875–80] cathode ray A beam of electrons streaming from the cathode (positively charged end) of a vacuum tube. When cathode rays strike the anode (negatively charged end) of the vacuum tube with sufficiently high energy, they produce x-rays.Thesaurus| Noun | 1. | cathode ray - a beam of electrons emitted by the cathode of an electrical discharge tubeelectron beam, beam, ray - a group of nearly parallel lines of electromagnetic radiation |
cathode ray
cathode ray[′kath‚ōd ¦rā] (electronics) A stream of electrons, such as that emitted by a heated filament in a tube, or that emitted by the cathode of a gas-discharge tube when the cathode is bombarded by positive ions. cathode rayIn the early part of the 20th century, it was the first name given to electron beams emitted from a negatively charged cathode in a vacuum tube. The term has been used ever since. See CRT.cathode ray
cathode rayA ray composed of negatively charged electrons discharged by a cathode through a vacuum, moving in a straight line and producing x-ray photons upon hitting solid matter. See also: raycathode ray
Related to cathode ray: cathode ray oscilloscopeWords related to cathode raynoun a beam of electrons emitted by the cathode of an electrical discharge tubeRelated Words |