Measurement of Charge-to-Mass (e/m) Ratio for the Electron
History J.J. Thomson flrst measured the charge-to-mass ratio of the fundamental particle of charge in a cathode ray tube in 1897. A cathode ray tube basically consists of two metallic plates in a glass tube which has ... Thomson repeated his measurement of e/m many times with difierent metals for cathodes and also difierent gases. Having ...
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