ICSE Class 9 Answered

Write a brief note on the discovery of cathode rays. Draw a neat labelled diagram of cathode ray tube.

Asked by Topperlearning User | 25 Aug, 2014, 01:45: PM

Expert Answer

Discovery of Cathode rays

J. J. Thomson created very low pressure inside the discharge tube and applied high voltage. He observed greenish glow near the anode of the glass tube.
The rays which are emitted from the cathode hit the anode and cause the greenish glow. The streams of rays emitted from the cathode are called cathode rays.

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Answered by | 25 Aug, 2014, 03:45: PM