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Physical constants |
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##Physical
Constants |
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Planck constant h
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=6.626 068 96 x 10-34
J s=4.135 667 33 x 10-15 eV s |
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Planck constant over 2p ħ |
=1.054 571 628 x 10-34
J s=6.582 118 99 x 10-16 eV s |
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electric constant e0 |
=8.854 187 817... x 10-12 F m-1 |
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magnetic constant m0 |
=4p x 10-7 H/m= 12.566 370 614... x 10-7
N A-2 |
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electron mass me
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=9.109 382 15 x 10-31 kg |
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elementary charge e
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=1.602 176 487 x 10-19 C |
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Boltzmann constant k |
=1.380 6504 x 10-23 J K-1 |
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speed of light in vacuum c, c0 |
=299 792 458 m s-1 |
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Newtonian constant of gravitation G |
=6.674 28 x 10-11 m3 kg-1 s-2 |
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Avogadro constant Na L |
=6.022 141 79 x 1023 mol-1 |
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molar gas constant R
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=8.314 472 J mol-1 K-1 |
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fine-structure constant a |
=e2/(4πεoℏc) [SI]=(e2cμ0)/2h [SI]=
e2/ℏc [cgs]=(137.035999074)-1 |
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Loschmidt constant |
= 2.6867811×1025[m-3]=2.6867811×1019[cm-3] |
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Useful Relations |
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Photon energy |
ℏw[J]=1.986/l[mm]´10-19 J ℏw[erg]=1.986/l[mm]´10-12 erg ℏw[eV]=1.24/l[mm] |
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Thermal Energy |
kT300K= hc×208.51 [cm-1]=25.9 [meV] |
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Electric Field of E-M wave
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E[V/cm]=27×(Iliner
pol [W/cm2])1/2 |
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E[V/cm]=19×(Icircular
pol [W/cm2])1/2 |
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