Quantum Electrodynamics Page

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"

QED is often called the most successful theory in the history of science because its predictions match experimental results with incredible precision—comparable to measuring the distance from New York to Los Angeles within the width of a human hair. Core Principles Quantum Electrodynamics

According to Feynman’s formulation, the entire universe of QED can be boiled down to three simple actions: A photon goes from one place and time to another. An electron goes from one place and time to another. is the relativistic quantum field theory that describes

Beyond being a mathematical masterpiece, QED provided the blueprint for the of particle physics. It showed scientists how to combine quantum mechanics with special relativity and successfully handle "renormalization"—a mathematical technique to remove the "infinities" that previously broke earlier theories. It showed scientists how to combine quantum mechanics