what are cathode rays?
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cathode rays are the negatively charged rays
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Cathode ray
A cathode ray is a stream of electrons that are seen in vacuum tubes. It is called a "cathode ray" because the electrons are being emitted from the negative charged element in the vacuum tube called the cathode. ... Electrons were discovered as the constituents of cathode rays in 1897 by British physicist J. J. Thomson.
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