What is Atomic ClockAlm. Atomische Uhr, Fr. Horloge Atomique, Eng. atomic clock. An instrument that measures time with great precision using the vibrations of atoms or molecules.
The basic unit of time measurement is the second. The second has been defined depending on the length of the solar day.
However, further precision is required for scientific studies.
The basis of the atomic clock is that its atoms and molecules can receive and give energy by absorbing or emitting energy at certain frequencies.
Work on these devices, called masers, which produce high-frequency stable electromagnetic waves from an atom or molecule system, began in 1940. In 1949, the US National Bureau of Standards manufactured the first watch based on the properties of the ammonia molecule. In 1955, an atomic clock was made in England using a cesium beam with a frequency of 9,192,631,750 cycles per second. The precision of this watch is 1/1011 and it was accepted as the international time standard in 1963.
In 1960, a hydrogen beam maser with 1/1012 precision was developed in the USA, and efforts are being made to increase the sensitivity to 1/1014. An accuracy of 1/1014 corresponds to an error of one second in three million years.
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