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Did JJ Thomson know about Eugen Goldstein’s experiment discovering canal rays?
We learn that JJ Thomson discovered the electron in 1897. Several years EARLIER in 1886, Eugen Goldstein performs the same experiment but with the anode and cathode switched to produce positively ...
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How did Thomson calculate the momentum of electron when he didn't know the mass of electron?
This was proven in 1903 by J. J. Thomson who calculated that the momentum of the electrons hitting the paddle wheel would only be sufficient to turn the wheel one revolution per minute. source
J. J. ...
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