Magnetic constant (vacuum permeability).

value = mu0
[value,sigma] = mu0

mu0 returns the value of the magnetic constant (vacuum permeability) in SI units in value and the standard deviation in sigma (if two output arguments are specified).

The SI unit of the magnetic constant is N A^-2 = T² m³ J^-1.

The value and the standard deviation are taken from the 2018 CODATA collection of recommended values.

amu, angstrom, avogadro, barn, bmagn, bohrrad, boltzm, clight, echarge, emass, eps0, evolt, faraday, gammae, gfree, hartree, hbar, molgas, nmagn, nmass, planck, pmass, rydberg