The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants

Constants
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Search results matching " adopted_in "...

Avogadro constant
Boltzmann constant
elementary charge
elementary charge over h-bar
hyperfine transition frequency of Cs-133
luminous efficacy
natural unit of momentum in MeV/c
Newtonian constant of gravitation over h-bar c
Planck constant
reduced Planck constant
reduced Planck constant times c in MeV fm
Rydberg constant times c in Hz
speed of light in vacuum
standard acceleration of gravity
standard atmosphere
standard-state pressure


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