A Feynman diagram does not show how a particle moves from
one point to another; the particle’s path, speed,
dimensionality, and nature are still mysteries, although quantum
electrodynamic theory describes the probabilities that it
undergoes events, such as when an electron absorbs or emits a
photon, or when a quark-antiquark pair radiates a gluon. Quantum
electrodynamics is a part of quantum field theory; a field is a
function that assigns a value for each point in a space (of some
kind).
A Feynman diagram does not show how a particle moves from one point to another; the particle’s path, speed, dimensionality, and nature are still mysteries, although quantum electrodynamic theory describes the probabilities that it undergoes events, such as when an electron absorbs or emits a photon, or when a quark-antiquark pair radiates a gluon. Quantum electrodynamics is a part of quantum field theory; a field is a function that assigns a value for each point in a space (of some kind).
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