The definition of the 'atomic' second

Astronomy and Astrophysics – Astronomy

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0



Scientific paper

When the reference of a unit is changed, the task remains of expressing the new definition in the terms of the previous one. In two centuries, for instance, the definition of the metre was changed six times. Around 1955, the definitions of the second as the SI unit of time were changed from astronomical ones, based on the rotation (or revolution) of the Earth, to a definition stemming from a quantum phenomenon. The expression of the new atomic second in terms of the previous definitions required a number of actions and measurements. The aim of this paper is to review these actions, some of which, fifty years later, are being forgotten for a lack of adequate documentation.

No associations


Say what you really think

Search for scientists and scientific papers. Rate them and share your experience with other people.


The definition of the 'atomic' second does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The definition of the 'atomic' second, we encourage you to share that experience with our community. Your opinion is very important and The definition of the 'atomic' second will most certainly appreciate the feedback.

Rate now


Profile ID: LFWR-SCP-O-1409376

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.