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Units and constants 449
List of constants
Category Name and symbol
Math
e
MAXREAL
MINREAL
i
Chemistry
Avogadro,
NA
Boltmann, k
molar volume, Vm
universal gas, R
standard temperature, StdT
standard pressure, StdP
Phyics
Stefan-Boltzmann,
speed of light, c
permittivity,
0
permeability,
0
acceleration of gravity, g
gravitation, G
Quantum
Planck, h
Dirac,
electronic charge, q
electron mass, me
q/me ratio, qme
proton mass, mp
mp/me ratio, mpme
fine structure,
magnetic flux,
Faraday, F
Rydberg, R
∞
Bohr radius, a
0
Bohr magneton,
B
nuclear magneton,
N
photon wavelength,
0
photon frequency, f
0
Compton wavelength,
c