R esearchers 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 ...

An atomic clock is known to be the most accurate measurement ... See real-time clock and atom. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

We normally think of atomic clocks as the gold standard in timekeeping. The very definition of a second — in modern times, at least — is 9,192,631,770 periods of the radiation corresponding to ...

The next generation of atomic clocks "ticks" with the frequency of ... They will therefore become the future basis for the worldwide definition of the second in the International System of Units ...

Precision equipment manufacturer Shimadzu Corp. said it has created the world’s most accurate time device: a clock that won’t ...

The Atomic Spectroscopy Group at the National Institute of Standards and Technology (NIST) provides the definitive measurements of atomic spectra. Spectra are specific sets of colors emitted by ...

Optical clocks, for example, have the potential to define the unit of time — the second — to a more precise degree than is possible in the atomic clocks used at present. The authors propose a ...