Monthly Archive for July, 2006

Optical atomic clock better than cesium clock

Optical Clock The National Institute of Standards and Technology (NIST) created a clock which uses ultraviolet radiation and a single mercury ion interactions. Oscillating around 100 000 times faster than cesium-cloud microwave (the old method of getting time), ultraviolet electromagnetic waves allow us to get a more precise definition of the second. It’s been said that the clock would be precise as much that it’ll take 70 million years before it’s off a second.
With further improvements since they submitted their new report, the NIST researchers have made a clock that’s about 10 times as precise as the world’s cesium standard, Bergquist says. According to NIST figures, the cesium standard would be off by no more than 1 second in 70 million years of continuous operation.