An electron emits or absorbs a photon at a specific place and time. Why It Matters
is the relativistic quantum field theory that describes how light and matter interact. It specifically focuses on the interactions between electrically charged particles (like electrons and positrons) and the electromagnetic field (represented by photons). The "Jewel of Physics" Quantum Electrodynamics
Developed by Richard Feynman, these are visual tools used to calculate the probability of particle interactions. Lines represent particles, and "vertices" represent where they meet and exchange energy. Licensed by Google Three Basic Actions An electron emits or absorbs a photon at