Question

Hello!!
How was electron discovered by William Crookes??
Explain in brief!​

Answer 1

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In 1885, Sir William Crookes carried out a series of investigations into the behaviour of metals heated in a vacuum. The experiment of Crookes and others showed that a heated cathode produced a stream of radiation, which could cause gases at low pressure to glow and which, make other substances emit light too. The radiation emitted from the cathode was given the name 'Cathode rays'. By mid-nineties it was known that these rays could be deflected by a magnetic field and they carried a negative charge. Some scientists felt that these rays were waves and others were inclined to think they were particles.

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Answer 2

Answer:

By the discharge tube experiment..... when it was seen that the negative rays emerged from the cathode.