The Ratio of Charge to Mass of an Electron
The currently held view is that matter can be conceived as being composed of a few elementary particles (12 in total). Of these elementary particles, only one – the electron – exists in our natural environment. The others become manifest in nuclear and particle reactions (muons, tauons and neutrinos) or are permanently enclosed in other particles (quarks).
Electrons can be easily released with the aid of electrical effects, and can be accelerated and pencilled with the aid of electrical fields. In this way, electron beams can be produced which can be made visible in an evacuated glass ball almost void of air. In a magnetic field, the electron beam is forced to follow an orbit according to the laws established by Newton and Lorentz. The ratio of charge to mass of the electron can be calculated from the diameter of the circle and the size of the magnetic field.
Location: Zweites Physikalisches Institut, Friedrich-Hund-Platz 1
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