What is a cesium atomic clocks

Cesium atomic clock is a kind of precise timing devices. Used in the daily life time accurate to 1 minutes was enough. But in the modern social production, scientific research and national defense construction and other departments, the requirement of time is much higher. They require time should be accurate to one hundred thousandth of a second, even one over one million of a second. In order to adapt to the requirement of the high precision, people create a series of precision timing devices, cesium clock is one of them. Cesium clock is also called "cesium atomic clocks".

Cesium atomic clock using cesium the electrons within the atoms between two energy level jump when the radiation of electromagnetic waves as a standard, to control the calibration of electronic oscillator, and control the move of the clock. High stability of the clock, the best cesium atomic clocks reach 2000 years by 1 second. Internationally, the widely used cesium atomic clock transition frequency as time and frequency standards, widely used in astronomy, geodesy and national defense construction and other fields.