US scientists claim world’s most accurate clock
2013 09 06

From: The Telegraph

US scientists say they have built the world’s most precise clock, whose ticking rate varies less than two parts in one quintillion, or 10 times better than any other.

The clock, made from the element ytterbium, could be used for technological advancements beyond timekeeping, such as navigation systems, magnetic fields and temperature.

"The stability of the ytterbium lattice clocks opens the door to a number of exciting practical applications of high-performance timekeeping," National Institute of Standards and Technology physicist, and co-author of the study revealing the clock, Andrew Ludlow said in a statement.


NIST’s ultra-stable ytterbium lattice atomic clock

While mechanical clocks use the movement of a pendulum to keep time, atomic clocks use an electromagnetic signal of light emitted at an exact frequency to move electrons in caesium atoms.

The physicists built their ytterbium clocks using about 10,000 rare-earth atoms cooled to 10 microkelvin (10 millionths of a degree above absolute zero) and trapped in an optical lattice made of laser light.

Another laser that "ticks" 518 trillion times per second triggers a transition between two energy levels in the atoms. The clock’s high stability is owed to the large number of atoms.

[...]

Read the full article at: telegraph.co.uk





Related Articles
Eternal Clock Could Keep Time After Universe Dies
Time is money: British police spent $54,000 on calls to talking clock
PHARAO atomic clock agreement signed by ESA and CNES
Astronomical Clocks – Literally and Metaphorically
Decoding Space and Time in the Brain
The Man Who Hears People Before They Speak
New atomic clock may ’redefine the second’


Latest News from our Front Page

Document Confirms British were Plotting to Invade Germay Before Germany Invaded Poland
2014 09 02
The declaration of war against Germany had nothing to do with Poland, and was in fact a brutal war of aggression launched for economic reasons against the peaceful German people. As you can see in Judea Declares War on Germany. From dailymail.co.uk: An early version of the ‘King’s Speech’ reveals Britain was preparing to declare war on Germany before Hitler invaded ...
Study Claims Cave Art Made by Neanderthals
2014 09 02
A series of lines scratched into rock in a cave near the southwestern tip of Europe could be proof that Neanderthals were more intelligent and creative than previously thought. The cross-hatched engravings inside Gorham’s Cave in Gibraltar are the first known examples of Neanderthal rock art, according to a team of scientists who studied the site. The find is significant because ...
EU Nanny State to Ban Toasters, Kettles & Hair Dryers!
2014 09 02
"Despite arctic sea ice growing by 43%, the EU nanny state is set to ban toasters, hair dryers and kettles in the name of preventing global warming."
Nigeria launches new biometric ID card - brought to you by Mastercard
2014 09 02
Yesterday afternoon, president Goodluck Jonathan became the first recipient of Nigeria’s new national eID card, in a ceremony at the presidential villa in the capital Abuja. The cards will be issued to 13 million Nigerians as part of a pilot project, with the ultimate aim of producing a national identity management system (NIMS). Nigeria’s NIMS is an ambitious attempt to consolidate ...
LA Times Now Describing Illegal Aliens As ’Informal Workers’ Who ’Labor Unofficially’
2014 09 02
Via Weasel Zippers, we learned the Los Angeles Times has a new term for illegal aliens in the work force: they’re “informal workers,” and that doesn’t mean they don’t arrive on the job in a tuxedo. Times reporter Tiffany Hsu (a "UC Berkeley grad") began her Saturday story with the new I-word (and illegal immigrants also “labored unofficially” in "gray employment"): Informal ...
More News »