The orbital motion of an electron (or any charged particle) around a certain axis produces a magnetic dipole with the magnetic moment of μ μ = e / 2 m ⋅ ⋅ j , where e and m are the charge and the mass of the particle, while j is the angular momentum of the motion (SI units are used). In contrast, the intrinsic magnetic moment of the electron is related to its intrinsic angular momentum (spin) as μ μ ≈ ≈ 2 ⋅ ⋅ e / 2 m ⋅ ⋅ j (see Landé g -factor and anomalous magnetic dipole moment).