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Is an atomic clock dangerous?
Without atomic clocks, GPS navigation would be impossible, the Internet would not synchronize, and the position of the planets would not be known with enough accuracy for space probes and landers to be launched and monitored. Atomic clocks are not radioactive. They do not rely on atomic decay.
What is the limit of accuracy of cesium clocks?
Caesium atomic-fountain clocks are used to set national time standards at NIST, at the Paris Observatory and elsewhere. The caesium fountain clock has an accuracy of about three parts in 10 quadrillion (3 × 10−16). This means that it will keep time to within one second over 100 million years.
What is the most accurate atomic clock?
Today, the most precise clocks are based on a natural atomic resonance of the cesium atom—the atomic equivalent of a pendulum. For example, NIST-F1, one of the world’s most accurate time standards based on microwave atomic clocks, neither gains nor loses a second in 20 million years.
Why do they use cesium in atomic clocks?
And that’s where caesium comes in. It has a far higher resonant frequency even than quartz – 9,192,631,770 Hz, to be precise. This is one reason Essen used the element to make the first of the next generation of clocks – the “atomic” clocks.