The origin of Relativity Theory is strongly tied to electrodynamics, and also the wealth of applications makes relativistic electrodynamics an important part of Einstein's theory. Quantum electrodynamics, which unites Relativity, electrodynamics and quantum theory, is perhaps the most precise physical theory we have, and its successes dominated our thinking about elementary particles during the period 19451960. Its predictions about the magnetic moments of the electron and the muon, accurate to eight decimal places, and the calculations of the spectral lines of hydrogen with a similar precision are at the same time our best confirmations of Relativity and of electrodynamics. They also show that the relativistic space-time concept is valid down to distances of about 10–15 cm.
KeywordsField Line Lorentz Transformation Tensor Field Antisymmetric Tensor Covariant Form
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