Physical Constants#

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 $$\mathrm{c}_0 \equiv \frac{1}{\sqrt{\varepsilon_0 \mu_0}} := \SI{299 792 458}{\meter\per\second}$$
Elementarladung $$\mathrm{e} \approx \SI{1.602 177e-19}{\coulomb}$$
Planck-Konst. $$h \approx \SI{6,626 069 57e-34}{\joule\second}$$
$$\hbar \equiv \frac{h}{2 \pi} \approx \SI{1.05457e-34}{\joule\second}$$
Elektr. Feldkonst. $$\varepsilon_0 = \SI{8.854 188e-12}{\farad\per\meter}$$
Magn. Feldkonst. $$\mu_0 := 4\pi \times \SI{e-7}{\henry\per\meter}$$
Avogadro-Konst. $$N_{\ir A} \approx \SI{6.022 141e23}{\per\mole}$$
Atomare Masse $$\mathrm{u} \approx \SI{1.660 539e-27}{\kilogram}$$
Elektronenmasse $$m_e \approx \SI{9,109 383e-31}{\kilogram}$$
Protonenmasse $$m_p \approx \SI{1,674 927e-27}{\kilogram}$$
Neutronenmasse $$m_n \approx \SI{1,672 622e-27}{\kilogram}$$
Gravitationskonst. $$\mathrm{G} \approx \SI{6,673 84e-11}{\kilogram\per\second\squared}$$
Boltzmann-Konst. $$k_{\ir B} \approx \SI{1.380 655e-23}{\joule\per\kelvin}$$