I noticed there is no entry electrodynamics so I “created” it as a redirect to the existing stub electromagnetism. Though I personally consider electromagnetism as a phenomenon in real world, while electrodynamics just as a theoretical formalism to describe it, i.e. a theory of electromagnetism. There is some overlap between existing entries, like there is another, rather stubby classical electrodynamics, and entry quantum electrodynamics. The real content is in electromagnetic field.
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