Atomic Clock: The Most Precise Timekeeping Devices

What is an Atomic Clock?
An atomic clock is a clock device that uses an electronic transition frequency in atoms as its timekeeping element. It is the most accurate time and frequency standard known, much more stable than mechanical clocks driven by oscillations or vibrations of a quartz crystal that are regulated by atomic transitions in the microwave, optical, and ultraviolet regions of the electromagnetic spectrum.

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