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：2025/11/28
cathode ray
（ plural ）
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(electricity) A ray consisting of a stream of electrons in a vacuum tube, that are emitted by the cathode and accelerated towards the anode by an electric field.
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cathode ray
The physicist adjusted the vacuum tube to observe the deflection of the cathode ray on the fluorescent screen.
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The physicist adjusted the vacuum tube to observe the deflection of the cathode ray on the fluorescent screen.
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