electrodynamics
Quick Summary
Electrodynamics is a branch of physics that studies the interactions between electric currents and magnets, or between electric currents themselves. It is concerned with the effects arising from these interactions.1
The field of electrodynamics is built upon the foundational work of scientists like James Clerk Maxwell, who unified the concepts of electricity, magnetism, and optics. Maxwell's equations describe how electric and magnetic fields are produced and interact. These equations reveal that changing magnetic fields can generate electric fields, and conversely, changing electric fields can produce magnetic fields. This interplay leads to the propagation of electromagnetic waves, including visible light, radio waves, and X-rays, all traveling at the speed of light.2345
Electrodynamics also encompasses electrostatics, the study of phenomena involving stationary electric charges. The principles of electrodynamics are crucial for understanding phenomena ranging from lightning to the behavior of atoms and molecules. Quantum electrodynamics (QED) is a more advanced theory that applies quantum mechanics to the electromagnetic field, explaining the interactions of particles like electrons and photons.657
Ask Britannica AI about this topic
Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.
