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hydrogen clock
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hydrogen clock

measurement instrument
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Learn about this topic in these articles:

  • Alfred North Whitehead
    time
    / Other atomic clocks

    Clocks regulated by hydrogen masers have been developed at Harvard University. The frequency of some masers has been kept stable within about one part in 1014 for intervals of a few hours. The uncertainty in the fundamental frequency, however, is greater than the stability of the clock; this…

    Read More

    Clocks regulated by hydrogen masers have been developed at Harvard University. The frequency of some masers has been kept stable within about one part in 1014 for intervals of a few hours. The uncertainty in the fundamental frequency, however, is greater than the stability of the clock; this…

    Read More