Which was a triumph of quantum electrodynamics (QED)?
A) QED predicted the existence of three carrier particles before they were discovered in laboratory experiments.
B) QED unites the strong and weak nuclear forces.
C) QED is an example of a theory of everything.
D) QED successfully explains the origin of quantum mechanical fluctuations in the CBR.

Question

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Quantum electrodynamics predicted the existence of three carrier particles (photon, W and Z bosons) before they were discovered in laboratory experiments. This was a major triumph of the theory.

Which Was a Triumph of Quantum Electrodynamics (QED)