Question

What is an atomic clock? Where is it kept?

Answer 1

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.

thanks

Answer 2

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