Electron Charge-to-Mass Ratio |
In the experiment, observe the trajectory of electron beam in a cathode-ray tube under the effects of accelerating electric field and external magnetic field to measure and calculate the electron charge-mass ratio. In 1897, Joseph Thomson in the Cavendish Laboratory of the University of Cambridge first calculated the charge-mass ratio of particles in the cathode-ray tube with this method, proving that the cathode ray was composed of negatively charged particles much smaller than a hydrogen atom. He named the particle “electron”, which has been used until today.
Video Electron Charge-to-Mass Ratio
|