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Cathode Rays

  1. Jan 12, 2012 #1
    When a high voltage is applied across the electrodes of the discharge tube, and the pressure of the gas inside the tube is lowered, the electrical energy knocks out some of the electrons from the atoms. These constitute the cathode rays. How does electrical energy knocks out electrons is something I want to know. Please explain.
     
  2. jcsd
  3. Jan 12, 2012 #2

    rcgldr

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