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• n  a timepiece that derives its time scale from the vibration of atoms or molecules

News & Articles

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• Atomic Clocks to Become Even More Accurate
  The ultimate accessory in exact timekeeping — the atomic clock — is set to become even more precise, after ultrashort laser pulses were successfully transmitted across open air to help synchronize the "ticking" of new optical atomic clocks.
  June 15, 2013 - LiveScience.com via Yahoo! News