Reference Entry

ammonia clock

in A Dictionary of Physics

Sixth edition

Published in print January 2009 | ISBN: 9780199233991
Published online January 2009 | e-ISBN: 9780191726798
ammonia clock

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A form of atomic clock in which the frequency of a quartz oscillator is controlled by the vibrations of excited

Reference Entry.  133 words. 

Subjects: Physics

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