Quantum Electrodynamics Apr 2026

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.

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 Quantum Electrodynamics

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 Beyond being a mathematical masterpiece, QED provided the

In QED, the electromagnetic force isn't a "static" field, but rather an exchange of photons . When two electrons repel each other, they are effectively "tossing" photons back and forth. When two electrons repel each other, they are