![]() These discharge tubes are devices that control the electric current between a potential difference applied to the electrodes in a high vacuum. If you want to know more about this discovery, then keep reading! What is a cathode ray?Ĭathode rays, also known as electron beams, are streams of electrons detected in discharge tubes (vacuum tubes). These rays played a significant role in discovering the electron. They are also known as e-beam or electron beams.
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