Rubidium Atomic Clock, a cheap, compact and widely used kind of atomic clocks

An atomic clock is the most accurate human measurement device. In an atomic clock, the atom acts as the pendulum of the clock. When an electron inside an atom transits between two energy levels, it either emits or absorbs an energy quantum of a precise ...

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An atomic clock is the most accurate human measurement device. In an atomic clock, the atom acts as the pendulum of the clock. When an electron inside an atom transits between two energy levels, it either emits or absorbs an energy quantum of a precise ... https://ift.tt/eA8V8J