Louis Essen

Louis Essen was a British physicist best known for his precise measurement of time. In 1955, he built the first accurate atomic clock using a cesium atom, which became the standard for measuring a second. His work revolutionized the way we keep time, enabling highly accurate GPS navigation, global communication, and scientific research. Essen’s innovations provided a reliable way to measure time at an atomic level, laying the foundation for modern timekeeping technology used worldwide.