An atomic clock is a clock that measures time by monitoring the resonant frequency of atoms. It is based on atoms having different energy levels. Electron states in an atom are associated with different energy levels, and in transitions between such states they interact with a very specific frequency of electromagnetic radiation.

2024年3月12日 · An atomic clock is a clock that uses the resonance frequencies of atoms as its resonator. According to Encyclopedia Britannica , the resonator is "regulated by the frequency of the microwave electromagnetic radiation emitted or absorbed by the quantum transition (energy change) of an atom or molecule."

Atomic clocks are designed to measure the precise length of a second, the base unit of modern timekeeping. The International System of Units (SI) defines the second as the time it takes a caesium-133 atom in a precisely defined state to oscillate exactly: 9 billion, 192 million, 631 thousand, 770 times.

2019年6月19日 · Atomic clocks combine a quartz crystal oscillator with an ensemble of atoms to achieve greater stability. NASA’s Deep Space Atomic Clock will be off by less than a nanosecond after four days and less than a microsecond (one millionth of a second) after 10 years.

2025年1月9日 · Atomic clock, type of clock that uses certain resonance frequencies of atoms (usually cesium or rubidium) to keep time with extreme accuracy. The electronic components of atomic clocks are regulated by the frequency of the microwave electromagnetic radiation.

2022年3月28日 · At a minuscule scale, an atomic clock employs the same fundamental processes as a grandfather clock or a wristwatch: it offers a periodic phenomenon that you can count.

2024年8月22日 · Read on to learn how different atomic clocks work, how atomic clocks help us tell time, the history of this remarkable technology and how atomic clocks have opened up profound and sometimes unexpected advances in both technology and science.

Atomic clocks have revolutionized how we tell time. These astoundingly accurate devices touch the lives of every person on Earth and keep us in sync no matter where we are. They make possible world-changing technologies such as GPS and help scientists explore some of the universe’s deepest mysteries.

What is an atomic clock? An atomic clock is a device that produces electronic 'ticks' at a rate related to certain electromagnetic oscillations of atoms. Atoms produce some of the most stable periodic signals currently known. Therefore, a clock based on …

2019年6月19日 · NASA's Deep Space Atomic Clock could be the most stable atomic clock ever flown in space. But what does that mean, and what do clocks have to do with space navigation?