In 1820, Hans Christian Ørsted made a groundbreaking discovery that linked electricity and magnetism, laying the foundation for electromagnetism. During a lecture, he noticed that a compass needle deflected when placed near a live electric current. This simple but revolutionary observation demonstrated that electric currents create magnetic fields, fundamentally altering scientific understanding.
Ørsted’s experiment showed that electricity and magnetism are not separate forces but interconnected phenomena. His findings inspired further research, eventually leading to James Clerk Maxwell’s equations and the development of modern electromagnetic technology.
Ørsted’s work has had profound implications, influencing everything from electric motors to wireless communication. His discovery is celebrated as a pivotal moment in physics and is a testament to the power of observation.