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Full Idea
The theory of electromagnetism that incorporates both special relativity and quantum mechanics is quantum electrodynamics (QED). It was developed by Dirac and others, and perfected in the 1940s. The field is a collection of quanta.
Gist of Idea
Quantum electrodynamics incorporates special relativity and quantum mechanics
Source
New Scientist writers (Why the Universe Exists [2017], 02)
Book Ref
New Scientist writers: 'Why the Universe Exists' [John Murray 2017], p.24
A Reaction
This builds on Maxwell's earlier classical theory. QED is said to be the best theory in all of physics.