Atomic clocks are clocks that keep the most accurate time by applying the property that atoms and molecules absorb and emit radio waves and light of unique frequencies. Tom van Burke, a software ...

stable isotope without radioactivity `` cesium 133 '' It has a low boiling point of 28 ° C. A mechanism that heats cesium atoms to create an atomic beam and measures the frequency to keep time.

For decades, atomic clocks have provided the most stable means of timekeeping. They measure time by oscillating in step with the resonant frequency of atoms, a method so accurate that it serves as the ...