Quantum Electrodynamics: a branch of quantum theory describing the interaction of particles with photons. It's main proponenet was Richard Feynman, creator of the ever-popular 'Feynman diagrams.'
"quantum electrodynamics describes all physical phenomena except gravity, radioactivity and nuclear physics; there is no significant difference between experiment and theory" Feynman.
by DBell March 18, 2005

by dbell October 15, 2006
