QED (Quantum Electrodynamics)

Quantum Electrodynamics (QED) is the theory that describes how light and matter interact at the quantum level. It combines quantum mechanics and the principles of electromagnetism, focusing on particles like electrons and photons (light particles). QED explains phenomena such as the emission and absorption of light by atoms and how particles can exchange force-carrying photons. This framework has led to precise predictions about the behavior of particles, contributing significantly to our understanding of fundamental forces in the universe. Remarkably, QED has been tested with extraordinary accuracy, making it one of the most successful theories in physics.