Why Do We Use Atoms To Keep Time?

By National Institute of Standards and TechnologyFrom YoutubeNovember 5, 2025

How do people around the world keep time together? They use atomic clocks. These remarkable devices tap into frequencies hidden in the hearts of atoms to produce astoundingly stable, accurate ticks of time – far better than any other kind of clock. This animation explains why we use atoms to keep time and how they keep us all on the beat. Want to know all about atomic clocks visit: https://www.nist.gov/atomic-clocks

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