Quantum Electrodynamics
Quantum Electrodynamics (QED) is the science of studying how light and matter interact. It combines principles of Quantum Mechanics, which explains the unpredictable behavior of tiny particles, with Electrodynamics, which describes how charged particles like electrons interact with electromagnetism. In essence, it's a theory explaining how particles like electrons and photons (light particles) communicate by emitting and absorbing virtual photons, essentially the "messenger" particles of electromagnetic forces. It's fundamental in understanding how our universe works on its smallest scales.
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Quantum electrodynamics (QED) is the theory that describes how light and matter interact through the exchange of particles called photons. It combines principles of quantum mechanics, which explains the behavior of tiny particles, with electromagnetism, the force that governs electric and magnetic fields. QED explains phenomena like the behavior of electrons in atoms and light emission. It reveals that particles are not just points, but can also exhibit wave-like properties, leading to a rich tapestry of interactions at the quantum level, ultimately enhancing our understanding of the fundamental forces in nature.