The unified field theory of electric and magnetic interactions, described by Maxwell's equations.
electric field: generated by charges, exerts force on other charges
magnetic field: generated by moving charges and changing electric fields
Maxwell's equations unify electricity, magnetism, and light into one framework
radiation is self-propagating oscillation of electromagnetic field
light is an electromagnetic wave traveling at the speed of light in spacetime
electromagnetic force is one of four fundamental forces — see force
basis for optics, electronics, and quantum mechanics via quantum electrodynamics
spectrum spans radio, microwave, infrared, visible light, ultraviolet, X-ray, gamma — see radiation