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A beam of electrons emitted from the cathode of a high-vacuum tube.
- ‘TV detector vans do not work by picking up radiation from the cathode ray tube’
- ‘Cold cathode ray technology illuminates the instrument faces, while the indicators are backlit.’
- ‘One member of the radio society even has a major collection of cathode ray oscilloscopes, which he displays along one complete wall in his home.’
- ‘This sends information to the cathode ray in the back of your television, which projects it onto the screen.’
- ‘Inside this glass tube, evacuated of air, a negatively charged and heated metal plate emitted a beam - a cathode ray - that could be focused and accelerated by its attraction towards a positively charged plate.’
cathode ray/ˈkaˌTHōd ˌrā/
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