Electromagnetism is a fundamental physical interaction that describes the relationship between electricity and magnetism. It posits that electric and magnetic fields are not separate forces but are intertwined manifestations of a single unified force. Changes in one type of field generate the other; for example, a changing magnetic field creates an electric field, and vice versa. This interconnectedness forms the basis for understanding electrical currents and waves, which propagate through space as electromagnetic radiation. This force governs the behavior of charged particles and is responsible for virtually all technological advancements from radio communication and power transmission to the operation of motors and generators, making it a foundational concept in modern physics.