1. Physical constants11. PHYSICAL CONSTANTSTable 1.1.Reviewed 2007 by P.J. Mohr and B.N. Taylor (NIST). Based mainly on the “CODATA Recommended Values of the FundamentalPhysical Constants: 2006” by P.J. Mohr, B.N. Taylor, and D.B. Newell (to be published in Rev. Mod. Phys, and J. Phys. Chem. Ref. Data).The last group of constants (beginning with the Fermi coupling constant) comes from the Particle Data Group. The figures in parentheses afterthe values give the 1-standard-deviation uncertainties in the last digits; the corresponding fractional uncertainties in parts per 109(ppb) aregiven in the last column. This set of constants (aside from the last group) is recommended for international use by CODATA (the Committeeon Data for Science and Technology). The full 2006 CODATA set of constants may be found athttp://physics.nist.gov/constants.QuantitySymbol, equationValueUncertainty (ppb)speed of light in vacuumc299 792 458 m s−1exact∗Planck constanth6.626 068 96(33)×10−34J s50Planck constant, reduced≡h/2π1.054 571 628(53)
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