The pendulum of this mid-century beauty is made ... With access to a 10-MHz timebase from a cesium fountain atomic clock — no less a clock than the one that’s used to define the SI second, ...

Even your Macbook or smartphone displays time which is synchronized to the NIST-F1 clock, a cesium fountain atomic clock (aka ... That was weird, usually pendulum wall clocks last for 8 days ...

Just as grandfather clocks use oscillations of a pendulum to measure time, atomic clocks define a second as 9,192,631,770 microwave oscillations of a cesium atom as it absorbs microwave radiation ...

Atomic clocks rely on the steady frequency ... “It’s similar to how pendulum clocks hanging on the same wall eventually swing in unison. But in our case, it’s atoms exchanging quantum ...

Atomic clocks, which depend in no way on gravitation ... such as a clock with a pendulum. He thinks that an earth satellite can be made to move in such a way that gas drag and light pressure ...