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Physics
Classical Physics
Electromagnetism
How does gauge invariance determine the nature of electromagnetism?
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[QUOTE="Dale, post: 6240260, member: 43978"] You are correct, that is a long way from Krauss’ statement. In fact, you can derive Maxwell’s equations from the gauge invariance, see: [URL]https://aapt.scitation.org/doi/abs/10.1119/1.17279?journalCode=ajp[/URL] as well as the original paper that this simplified version is based on. One key thing to recognize is the importance of Noether’s theorem. Any invariance of the Lagrangian leads to a conserved quantity. In the case of the EM gauge invariance the corresponding conserved quantity is the charge. The conservation of charge itself can be used to derive half of Maxwell’s equations. [/QUOTE]
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Forums
Physics
Classical Physics
Electromagnetism
How does gauge invariance determine the nature of electromagnetism?
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