cesium clock

A cesium clock is an extremely precise timekeeping device that uses the vibrations of cesium atoms to measure time. Cesium atoms oscillate at a very stable frequency when exposed to microwave radiation. The International System of Units (SI) defines one second based on these oscillations: exactly 9,192,631,770 cycles of the cesium atom's microwave radiation. This remarkable accuracy makes cesium clocks essential for global positioning systems (GPS), telecommunications, and scientific research, ensuring precise timekeeping across various applications and contributing to the synchronization of time worldwide.