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phys documents (dragged) 8 - Physical Constants Name Number...

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Physical Constants Name Symbol Value Unit Number π π 3.14159265358979323846 Number e e 2.71828182845904523536 Euler’s constant γ =l im n →∞ ± n k =1 1 /k - ln( n ) ² =0 . 5772156649 Elementary charge e 1 . 60217733 · 10 - 19 C Gravitational constant G, κ 6 . 67259 · 10 - 11 m 3 kg - 1 s - 2 Fine-structure constant α = e 2 / 2 hc ε 0 1 / 137 Speed of light in vacuum c 2 . 99792458 · 10 8 m/s (def) Permittivity of the vacuum ε 0 8 . 854187 · 10 - 12 F/m Permeability of the vacuum μ 0 4 π · 10 - 7 H/m (4 πε 0 ) - 1 8 . 9876 · 10 9 Nm 2 C - 2 Planck’s constant h 6 . 6260755 · 10 - 34 Js Dirac’s constant ¯ h = h/ 2 π 1 . 0545727 · 10 - 34 Js Bohr magneton μ B = e ¯ h/ 2 m e 9 . 2741 · 10 - 24 Am 2 Bohr radius a 0 0 . 52918 ˚ A Rydberg’s constant Ry 13.595 eV Electron Compton wavelength λ Ce = h/m e c 2 . 2463 · 10 - 12 m Proton Compton wavelength λ Cp = h/m p c 1 . 3214 · 10 - 15 m Reduced mass of the H-atom μ H 9 . 1045755 · 10 - 31 kg Stefan-Boltzmann’s constant σ 5 . 67032 · 10 - 8 Wm - 2 K - 4 Wien’s constant k W 2 . 8978 · 10 - 3 mK Molar gasconstant R 8.31441 J · mol - 1 · K - 1 Avogadro’s constant N A 6 . 0221367 · 10 23 mol - 1 Boltzmann’s constant k = R/N A 1 .
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This note was uploaded on 01/30/2011 for the course PHYSICS 208 taught by Professor Ye during the Spring '10 term at Blinn College.

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