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cathode ray

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cathode ray

Stream 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 ray
In 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 [′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.


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company called Executive Recycling that was said to have exported a container of cathode ray tubes, the main part in computer monitors and television sets that contains lead, to Hong Kong.
People who struggle to pay their power bills are likely to be getting by with an old fashioned cathode ray tube set until it gives up the ghost.
95 Hardcover Science, technology and culture, 1700-1945 Q143 Crooks is known for discovering thallium, inventing the radiometer, experimenting with cathode rays using the Crookes tube, predicting that mankind would starve unless science removed the excess nitrogen from the atmosphere, and being interested in spiritualism.
 
 
 
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