The Discovery Of The Electron

The Discovery Of The Electron The Discovery Of The Electron The electron was atomic reactor in 1895 by J.J. Thomson in the form of cathode rays, and was the first dewy-eyed particle to be identified. The electron is the lightest known particle which possesses an ball over charge. Its rest mass is Me <approximately equal> 9.1 x 10 -28 g, about 1/1836 of the mass of the proton or neutron. The charge of the electron is -e = -4.8 x 10^-10 esu <elec trostatic unit). The sign of the electrons charge is negative by convention, and that of the equally charged proton is positive.

T his is somewhat a unfortunate convention, because the liquify of electrons in a conductor is opposite to the conventional direc tion of the current. The more or less accurate direct measurement of e is the oil skimming experiment conducted by R.A. Milikan in 1909. In this experiment, the charges of droplets of oil in air are measured by finding the galvanising field which balances each dro...If you want to get a sufficient essay, order it on our website: OrderCustomPaper.com

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