Maxwell's equations

Maxwell's equations are four fundamental equations that describe how electric and magnetic fields behave and interact with charges and currents. Formulated by James Clerk Maxwell in the 1860s, they unified Electricity and Magnetism into a single framework called Electromagnetism.

The four equations govern: how electric charges create electric fields, how moving charges generate magnetic fields, how changing magnetic fields induce electric fields, and the absence of magnetic monopoles. Together, they reveal that light itself is an electromagnetic wave propagating through space at a constant speed—a profound insight that revolutionized physics.

Maxwell's equations are the classical foundation for understanding countless phenomena: from Radio waves and infrared light to X-rays and the behavior of matter in plasma. They remain essential in engineering, Astrophysics, and modern technology, though they must be supplemented by Quantum mechanics to describe behavior at atomic scales.

The elegance of Maxwell's framework demonstrates how nature's complexity emerges from simple, beautiful principles—a hallmark of deep physical law.

Related

Electromagnetism, Light, Quantum mechanics, Faraday's law, Electromagnetic radiation, Causality