A quick review of JJ Thomson's discovery of the electron

In 1897 JJ Thomson, by manipulating cathode rays with bot electric fields and magnetic fields was able to conclusive confirm the existence of electrons

See my longer explanation here...

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[braaitongs]

I am busy reading his book Electricity and Matter. He called them corpuscles.

[naveensingh]

it was electron emitted from cathode metal plate, or electron knocked out as a result of air inside the tube got ionised?