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Definition

A physical constant is a physical quantity that is generally believed to be both universal in nature and have constant value in time.

Constant Value
Lichtgeschwindigkeit $\mathrm{c}_0 \equiv \frac{1}{\sqrt{\varepsilon_0 \mu_0}} := {299 792 458\,\mathrm{{\text{m}{\,}}{/}{\text{s}{\,}}}}$
Elementarladung $\mathrm{e} \approx {1.602 177e-19\,\mathrm{{\text{C}{\,}}}}$
Planck-Konst. $h \approx {6,626 069 57e-34\,\mathrm{{\text{J}{\,}}{\text{s}{\,}}}}$
$\hbar \equiv \frac{h}{2 \pi} \approx {1.05457e-34\,\mathrm{{\text{J}{\,}}{\text{s}{\,}}}}$
Elektr. Feldkonst. $\varepsilon_0 = {8.854 188e-12\,\mathrm{{\text{F}{\,}}{/}{\text{m}{\,}}}}$
Magn. Feldkonst. $\mu_0 := 4\pi \times {e-7\,\mathrm{{\text{H}{\,}}{/}{\text{m}{\,}}}}$
Avogadro-Konst. $N_{{\rm}A} \approx {6.022 141e23\,\mathrm{{/}{\text{mol}{\,}}}}$
Atomare Masse $\mathrm{u} \approx {1.660 539e-27\,\mathrm{{\text{kg}{\,}}}}$
Elektronenmasse $m_e \approx {9,109 383e-31\,\mathrm{{\text{kg}{\,}}}}$
Protonenmasse $m_p \approx {1,674 927e-27\,\mathrm{{\text{kg}{\,}}}}$
Neutronenmasse $m_n \approx {1,672 622e-27\,\mathrm{{\text{kg}{\,}}}}$
Gravitationskonst. $\mathrm{G} \approx {6,673 84e-11\,\mathrm{{\text{kg}{\,}}{/}{\text{s}{\,}}{^{2}}}}$
Boltzmann-Konst. $k_{{\rm}B} \approx {1.380 655e-23\,\mathrm{{\text{J}{\,}}{/}{\text{K}{\,}}}}$
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