This data is derived from the 1986 CODATA recommended values of the
fundamental physical constants. It is not intended to be an authoritative
source: typographical errors are possible and the data has been reformatted.
You can find the more complete information from the NIST at hppt://physics.nist.gov/PhysRefData/codata86/codata86.html.
|
|
Constant |
Symbol |
Value |
Units |
|
1 |
Speed of light in vacuum |
(c) |
299792458 |
m s-1 |
|
2 |
Permeability of vacuum |
(mu_0) |
1.25663706143592e-06 |
NA-2 |
|
3 |
Permittivity of vacuum |
(epsilon_0) |
8.854187817e-12 |
F m-1 |
|
4 |
Newtonian constant of gravitation |
(G) |
6.67259e-11±8.5e-15 |
m3 kg-1s-2 |
|
5 |
Planck constat |
(h) |
6.6260755e-34± 4.0e-40 |
J s |
|
6 |
Planck constant in eV |
|
4.1356692e-15 ± 1.2e-21 |
eV s |
|
7 |
h-bar |
(h-bar) |
1.05457266e-34 ± 6.3e-41 |
J s |
|
8 |
h-bar in eV |
|
6.582122e-16± 2.0e-22 |
eVs |
|
9 |
Planck mass |
(m_p) |
2.17671e-08±1.4e-12 |
kg |
|
10 |
Planck length |
(l_p) |
1.61605e-35±1.0e-39 |
m |
|
11 |
Planck time |
(t_p) |
5.39056e-44 ±3.4e-48 |
s |
|
12 |
Elementary charge |
(e) |
1.60217733e-19±4.9e-26 |
C |
|
13 |
Magnetic flux quantum |
(Phi_0) |
2.067836461e-15±6.1e-22 |
Wb |
|
14 |
Josephson frequency-voltage quotient |
|
483597670000000 ±1.4e+0.8 |
V-1 s-1 |
|
15 |
Quantized Hall conductance |
|
3.87404614e-0.5± 1.7e-12 |
Omega-1 |
|
16 |
Quantized Hall resistance |
(R_H) |
25812.8056±0.0012 |
Omega |
|
17 |
Bohr magnetion |
(mu_B) |
9.2740154e-24±3.1e-30 |
J T-1 |
|
18 |
Bohr magneton in eV |
|
5.78838263e-0.5±5.2e-12 |
e V T-1 |
|
19 |
Bohr magnetion in Hz |
|
13996241800±4200 |
T-1 s-1 |
|
20 |
Bohr magnetion in wavenumbers |
|
46.686437±1.4e-0.5 |
m-1T-1 |
|
21 |
Bohr magnetion in kelvins |
|
0.6717099±5.7e-0.6 |
K T-1 |
|
22 |
Nuclear magneton |
(mu_N) |
5.0507866e-27±1.7e-33 |
J T-1 |
|
23 |
Nuclear magneton in eV |
|
3.15245166e-0.8±2.8e-15 |
eV T -1 |
|
24 |
Nuclear magneton in Hz |
|
76225591.4±2.3 |
T-1S-1 |
|
25 |
Nuclear magneton in wavenumbers |
|
0.0254262281±7.7e-0.9 |
m-1 T-1 |
|
26 |
Nuclear magneton in kelvins |
|
0.0003658246±3.1e-0.9 |
K T-1 |
|
27 |
Fine structure constant |
(alpha) |
0.00729735308 ± 3.3e-10 |
|
|
28 |
Inverse fine structure constant |
|
137.0359895±6.1e-0.6 |
|
|
29 |
Rydberg constant |
(Ry) |
10973731.534 ± 0.013 |
m-1 |
|
30 |
Rydberg constant in Hz |
|
3.2898419499e+15 ±3.9e+0.6 |
s-1 |
|
31 |
Rydberg constant in joules |
|
2.1798741e-18±1.3e-24 |
J |
|
32 |
Rydberg constant in eV |
|
13.6056981±4.0e-0.6 |
eV |
|
33 |
Bohr radius |
(a_0) |
5.29177249e-11±2.4e-18 |
m |
|
34 |
Hartree energy |
(E_h) |
4.3597482e-18±2.6e-24 |
J |
|
35 |
Hartree energy in eV |
|
27.2113961± 8.1e-0.6 |
eV |
|
36 |
Quantum of circulation |
|
0.000363694807±3.3e-11 |
m2 s-1 |
|
37 |
Electron mass |
(m_e) |
9.1093897e-31±5.4e -37 |
kg |
|
38 |
Electron mass in u |
|
0.000548579903±1.3e-11 |
u |
|
39 |
Electron mass in eV |
|
510999.06±0.15 |
eV |
|
40 |
Electron-muon mass ration |
|
0.00483633218±7.1e-10 |
|
|
41 |
Electron-proton mass ratio |
|
0.000544617013 ±1.1e-11 |
|
|
42 |
Electron-deuteron mass ratio |
|
0.00272443707±6e -12 |
|
|
43 |
Electron-alpha-particle mass ratio |
|
0.000137093354±3e-12 |
|
|
44 |
Electron specific charge |
|
-175881962000±-53000 |
C kg-1 |
|
45 |
Electron molar mass |
|
5.48579903e-07±1.3e-14 |
kg mol-1 |
|
46 |
Electron Compton wavelength |
(lambda _C) |
2.42631058e-12±2.2e-19 |
m |
|
47 |
Electron Compton wavelength over 2 pi |
(lambda -bar_C) |
3.86159323e-13±3.5e-20 |
m |
|
48 |
Electron classical radius |
(r_e) |
2.81794092e-15±3.8e-22 |
m |
|
49 |
Electron Thomson cross section |
(sigma _e) |
6.6524616 -29±1.8e -35 |
m2 |
|
50 |
Electron magnetic moment |
|
9.2847701e-24±3.1e-30 |
J T-1 |
|
51 |
Electron magnetic moment in Bohr magnetons |
|
1.001159652193±1.0e-11 |
|
|
52 |
Electron magnetic moment in umclear magnetons |
|
1838.282 ±3.7-05 |
|
|
53 |
Electron magnetic moment anomaly |
(a_e) |
0.001159652193±1.0e-11 |
|
|
54 |
Electron g-factor |
(g-e) |
2.002319304386±2.0e-11 |
|
|
55 |
Electron-muon magnetic moment ratio |
|
206.766967 ±3.0e-05 |
|
|
56 |
Electron-proton magnetic moment ratio |
|
658.2106881±6.6e -06 |
|
|
57 |
Muon mass |
|
1.8835327e-28±1.1e-34 |
kg |
|
58 |
Muon mass in u |