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The following table comes from Astrophysical Formulae by Kenneth
R. Lang, California Institute of Technology, Pasadena, California and
Tufts University, Medford, Massachussetts.
Physical Constants
Symbol
Meaning
Value
c
Speed of light in vacuum
2.997924562(11) x 1010 cm sec-1
h = 2
Planck's constant
6.626196(50) x 10-27 erg s
= h / 2
Rationalized Planck's constant
1.0545919(80) x 10-27 erg s
k
Boltzmann's constant
1.380622(59) x 10-16 erg K-1
e
Elementary charge of an electron
4.803250(21) x 10-10 ESU
me
Rest mass of the electron
9.109558(54) x 10-28 g
G
Gravitational constant
6.6732(31) x 10-8 dyne cm2 g-2
NA
Avogadro's number
6.022169(40) x 1023 mole-1
a.m.u. = u
Atomic mass unit
1.660531(11) x 10-24 g
Fine-structure constant
7.297351(11) x 10-3
e / m
Electron charge-to-mass ratio
5.272759(16) x 1017 esu g-1
R
Rydberg constant
1.09737312(11) x 105 cm-1
a0
Bohr radius
5.2917715(81) x 10-9 cm
h / (mc)
Compton wavelength
2.4263096(74) x 10-10 cm
r0 =
e2 / (mc2)
Classical electron radius
2.817939(13) x 10-13 cm
R
Gas constant
8.31434(35) x 107 erg K-1 mole-1
Stefan-Boltzmann constant
5.66961(96) x 10-5 erg cm-2 s-1
K-4
T
Thomson cross section
6.652453(62) x 10-25 cm2
au
Astronomical unit
1.49597892(1) x 1013 cm
pc
Parsec
3.0856(1) x 1018 cm
ly
Light year
9.4605 x 1017 cm = 6.324 x 104 au
M
Solar mass
1.989(2) x 1033 g
R
Solar radius
6.9598(7) x 1010 cm
L
Solar luminosity
3.826(8) x 1033 erg sec-1
eV
Electron volt
associated wavelength
associated wavenumber
associated frequency
associated energy
associated temperature
1.23963 x 10-4 cm
8.0671 x 103 cm-1
2.41838 x 1014 Hz
1.60184 x 10-12 erg
1.16059 x 104 °K