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cathode ray |
Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson | 0.09 sec. |
cathode rayStream of electrons leaving the negative electrode, or cathode, in an evacuated or gas-filled discharge tube or emitted by a heated filament in certain electron tubes. Cathode rays cause fluorescent materials to luminesce and are utilized in cathode-ray oscilloscopes and television tubes (see cathode-ray tube). 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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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LG Philips is a Hong Kong-based maker of cathode ray tubes (CRTs) used in televisions and monitors. Those electronics are now banned from California landfills because the cathode ray tubes and liquid crystal display or LCD monitors contain toxic metals that can leach from dumps over time. Nine of 30 cathode ray tubes from color computer monitors passed the standard shredded-parts test even though separate tests have shown that most of these tubes contain huge amounts of lead (SN: 11/4/00, p. |
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