What is an atomic clock? Where is it kept?
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hey dear
An atomic clock is a clock device that uses an electron transition frequency in the microwave, optical, or ultraviolet region of the electromagnetic spectrum of atoms as a frequency standard for its timekeeping element.
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Atomic clock is that type of clock which generally uses hyperfine transition frequency in an electron transition frequency.
These clocks are built to get the exact length of a second .This clock is much more efficient than counting.Through this clock we can get the exact precision.
In India it is kept in National Physical Laboratory of India New Delhi