Magnetic dipole radiation (source code)

= Magnetic dipole radiation

Electromagnetic duality replaces the electric dipole $p$ by $m/c$ for a magnetic dipole moment $m$. Therefore
$$
\mathcal P=\frac{\mu_0}{6\pi c^3}|\ddot m|^2.
$$

This is the magnetic-dipole term of the <multipole radiation> expansion.