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A set of four equations that define electrodynamics. They comprise the Gauss laws for the electric and magnetic fields, the Faraday law, and the Ampère law. Together, these equations uniquely determine the electric and magnetic fields of a physical system. Do not use this tag for the thermodynamical equations known as Maxwell's relations.

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According to electrodynamics the photon is massless. That is due to gauge invariance. But if the photon were massive what would be the change in the electric and magnetic field? Is the massive nature …
asked May 13 '18 by Maxwell
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Maxwell's equations are covariant under Lorentz transformations. Are they covariant under going to a rotating frame and if not how do they look?
asked Nov 2 '18 by Maxwell