By Barus C.
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Additional info for An Electrodynamometer Using the Vibration Telescope (1919)(en)(7s)
Int-17 Dirac’s equation is still not the final theory for hydrogen because it does not take into account the fact that electric forces are ultimately caused by photons. The wave theory of the electron that takes the photon nature of the electric force into account is known as quantum electrodynamics. The predictions of quantum electrodynamics are in complete agreement with experiment, it is the most precisely tested theory in science. The problems resulting from treating the electron as a point particle were handled in quantum electrodynamics by renormalization.
The rules governing the behavior of all this was quantum mechanics on a small scale, which became Newtonian mechanics on the larger scale of our familiar world. There were a few things still to be straightened out, such as the question as to whether energy was conserved in beta decays, and in fact why beta decays occurred at all, but it looked as if these loose ends should be soon tied up. The opposite happened. By 1960, there were well over 100 so called elementary particles, all of them unstable except for the familiar electron, proton and neutron.
If the muon were the nuclear force meson, it should interact strongly with nuclei and be stopped rapidly. Thus the muon was seen as not being Yukawa’s particle. Then there was the question of what role the muon played. Why did nature need it? boggling to think of the nuclear force as being caused by over 100 different kinds of mesons, while the electric force had only one particle, the photon. One of the helpful ways of viewing matter at that time was to identify each of the particle decays with one of the four basic forces.