The core principle of atomic clocks is based on the quantum characteristics of atoms, particularly atomic energy level transitions. Atomic clocks determine time by measuring the specific frequency of ...

Thanks to Einstein's theory of relativity, numerous tests have concluded tangible effects on how we on Earth record and ...

A new nuclear clock, which uses the low-energy transition in the nucleus of a thorium-229 atom, could help detect the most ...

Atomic clocks record time using microwaves at a frequency matched to electron transitions in certain atoms. They are the basis upon which a second is defined. But there is a new kid on the block ...

Atomic clocks use quantum physics and the resonant frequency of atoms, like cesium, to define time with incredible precision.

NIST scientists have published results establishing a new atomic clock, NIST-F4, as one of the world’s most accurate timekeepers, priming the clock to be recognized as a primary frequency ...

The team’s innovative use of separated atomic clocks to measure these time shifts allows them to look for patterns of change that indicate the presence of dark matter waves.

Researchers have developed a new approach in optical atomic clocks that brings forth a major goal in science: the redefinition of a second. The fundamental unit of time could soon be based on ...

At this point, atomic clocks are old news. They’ve been quietly keeping our world on schedule for decades now, and have been through several iterations with each generation gaining more ...

August 5th, 2025, is predicted to be one of the shortest days of the year, approximately 1.34 milliseconds shorter than 24 ...

Atomic Clock: A device that utilises the natural oscillations of atoms to maintain time with exceptional accuracy. Frequency Standard: A reference device or signal used to calibrate and measure ...