Cesium Atomic Clock

Motion and Time of Class 7

International Atomic Time is an extraordinarily exact means of time-keeping posses. Atomic clocks deviate only 1 second in about 20 million of years.

The secret to this impeccable precision is the correct measurement of the second as the base unit of modern time keeping. The International System of Units (SI) defines one second as the time it takes a Cesium-133 atom at the ground state to oscillate exactly 9,192,631,770 times. Atomic clocks are designed to detect this frequency, most of them today using atomic fountains.

cesium atomic clock

clock revision

Talk to Our counsellor