meaning they’ll either display the digits of the actual time or they’ll have a clock face with hands indicating the time. Digital clocks may be easier for some people to read at a glance ...
A shown-up picture: a crystal from indium- (pink) and ytterbium (blue) ions. (Credit: Physikalisch-Technische Bundesanstalt) Traditional ion-based atomic clocks face a significant limitation: they ...
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