Quantum Electrodynamics (QED)

Quantum Electrodynamics (QED) is a theory that describes how light and matter interact. It combines the rules of quantum physics with the theory of electromagnetism. In QED, particles of light, called photons, are exchanged between matter particles, like electrons, causing them to push or pull each other. This is similar to throwing a ball to someone to move them backwards. It's considered one of the most accurate theories in physics.