Frequency Metrology and the Fundamental Physical Constants

  • B. W. Petley
  • J. L. Flowers
Conference paper


The fundamental physical constants of the twentieth century have conventionally comprised the group: c, e, m e, m p, h, N A, k and G. This group involves all of the base SI units save the candela. Frequency measurements play an increasingly important part in determinations of their values[1–3] in SI units.


Josephson Effect Hall Resistance Fundamental Physical Constant Hydrogen Maser Quantum Metrology 
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Copyright information

© Springer-Verlag Berlin, Heidelberg 1989

Authors and Affiliations

  • B. W. Petley
    • 1
  • J. L. Flowers
    • 1
  1. 1.National Physical LaboratoryTeddington, MiddlesexUK

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