Monday, September 2, 2013

USA physicists revealed the world`s more precise experimental atomic clock.

WorldWide Tech & Science. Francisco De Jesùs.

USA physicists revealed   the world`s more precise experimental atomic clock.



USA physicists revealed   the world`s more precise experimental atomic clock , able to maintain accuracy and range in less than a second in 1800 million years , the age of the Universe .

 This clock runs ytterbium atoms , rare earth element , and regularly laser enabling flapping 10 times higher than the best existing atomic clocks , needed . Compared with a quartz watch , this new device is 10 000 million times more accurate . 

This physical progress has important potential implications not only for accuracy , but in the universal time measurement , but also for example for GPS and a set of sensors from different forces like gravity , magnetic fields and temperature, explains Andrew Ludlow , physical, of the National Institute of Standards and Technology ( NIST , for its acronym in English) .

 " This is an important step in the evolution of the atomic clocks of the next generation development in the world today " , he said. Like all clocks, as atomic kept time based on the duration of one second , which corresponds to a physical phenomenon that plays regularly . While mechanical watches use the motion of a pendulum to keep time , atomic clocks are based on the frequency constant provided the necessary light to vibrate a cesium atom , the current international reference . The latter are based on atomic clocks 10 000 cooled ytterbium atoms slightly above absolute zero ( -273.15 degrees Celsius). These atoms are trapped in optical lattices formed by laser beams. Another laser flaps at least 518 million times per second, creating a transition between two energy levels in the atoms vibration ensures regularity even greater than that of a cesium atom , and could lead to a new international definition second and therefore universal time .

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