German CS2 caesium atomic clock

German CS2 caesium atomic clock

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This image is part of the feature Atomic Clocks

Credit: ALEXANDER TSIARAS/SCIENCE PHOTO LIBRARY

Caption: The CS2 caesium atomic clock at the German National Standards Laboratory, near Hannover. Caesium atomic clocks operate by counting the oscillations of vapourised caesium-133 atoms in an electromagnetic field. One second is equivalent to 9, 192,631,770 oscillations. The CS2 clock is the world's most accurate, losing about 3 billionths of a second a day (one second in one million years).

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Keywords: atomic, atomic clock, clock, cs2, device, equipment, german national, instrument, measurement, science, scientific, standards laboratory, time, time keeping

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