what is cathode rays?
Answers
Answer:
Cathode rays are streams of electrons observed in discharge tubes.
Answer:
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Explanation:
cathode ray is a beam of electron emitted from the cathode of a high - vacuum tube. cathode ray are streams of electrons observed in discharge tubes.
If an evacuated glass tube is equipped with two electrodes and voltage is applied ,glass behind the position electrode is observed to glow, due to electrons emitted from the cathode ( the electrode connected to the negative terminal of the voltage supply ) .
They were first observed in 1869 by a German physicist and were named in 1876 as kathodenstrahlen or cathode rays.
In 1897 , British physicist J. J. Thomas showed that cathode rays were composed of a previously unknown negatively charged particles , which was later named the electron.
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