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The photon is the quantum of the electromagnetic four-potential, and therefore the massless bosonic particle associated with the electromagnetic force, commonly also called the "particle of light". Use this tag for questions about the quantum-mechanical understanding of light and/or electromagnetic interactions.

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From geodesic motion of photons to Maxwell equations in curved spacetime

My question is therefore the following: Considering, loosely speaking, an electromagnetic wave to be a collection of photons, how can the latter be derived, in some limit(?), from the former? …
John Fredsted's user avatar