James C. Maxwell's equations

James C. Maxwell's equations describe how electric and magnetic fields interact and propagate. They show that changing electric fields create magnetic fields, and vice versa, allowing electromagnetic waves—like light—to travel through space. These equations unify electricity, magnetism, and optics into a single framework, explaining phenomena from radio waves to visible light. In essence, they reveal that electromagnetic fields are interconnected and can transfer energy across distances, forming the foundation of many modern technologies such as communication, radar, and wireless devices.