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  • Cathode rays are not electromagnetic rays because the cathode ray is a beam of electrons that travel from the negatively charged to positively charged end of a vacuum tube, across a voltage difference between the electrodes placed at each end.
  • The electrode at the negative end is called a cathode; the electrode at the positive end is called an anode.
  • Since electrons are repelled by the negative charge, the cathode is seen as the "source" of the cathode ray in the vacuum chamber.
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∙ 12y ago

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