Latest Atomic clock Stories
Finally, an optical frequency comb that visibly lives up to its name.
TUALATIN, Ore., Oct. 28 /PRNewswire/ -- As daylight-saving time approaches, consumers nationwide are able to relieve the stress of remembering to change their clocks.
PTB researchers want to construct the "atomic clock of the future" much more simply and more compactly than the previous elaborate laboratory set-ups.
An experimental atomic clock based on ytterbium atoms is about four times more accurate than it was several years ago, giving it a precision comparable to that of the NIST-F1 cesium fountain clock, the nation's civilian time standard, scientists at the National Institute of Standards and Technology (NIST) report in Physical Review Letters.
Researchers have figured out how to nullify collision effects and make the clock still more precise.
A clock that is so precise that it loses only a second every 300 million years â€“ this is the result of new research in ultra cold atoms.
Institute of Quantum Electronics, School of Electronics Engineering and Computer Science, Peking University, has proposed the concept, principles and techniques of active optical clock.
Caesium fountains are more accurate than "normal" atomic caesium clocks, because in fountains the caesium atoms are cooled down with the aid of laser beams and come ever slower - from a rapid velocity at room temperature to a slow "creep pace" of a few centimetres per second at a temperature close to the absolute zero point.
This year will be longer than usual -- by one second, the U.S. Institute of Standards and Technology said Wednesday. The earth is sufficiently out of sync that a leap second has been scheduled for 7 p.m. U.S. Eastern Standard Time on Dec.
The world's timekeepers are making the year 2008 even longer by adding a leap second to the last day of the year.
- A gift; a largess; a gratuity; a present; a dole.