\Section{dipole}
    \desc{Dipoles}{}{}
    \desc[german]{Dipole}{}{}

    \begin{formula}{poynting}
        \desc{Dipole radiation Poynting vector}{}{}
        \desc[german]{Dipolsrahlung Poynting-Vektor}{}{}
        \eq{\vec{S} = \left(\frac{\mu_0 p_0^2 \omega^4}{32\pi^2 c}\right)\frac{\sin^2\theta}{r^2} \vec{r}}
    \end{formula}

    \begin{formula}{power}
        \desc{Time-average power}{}{}
        \desc[german]{Zeitlich mittlere Leistung}{}{}
        \eq{P = \frac{\mu_0\omega^4 p_0^2}{12\pi c}}
    \end{formula}

\Section{misc}
    \desc{misc}{}{}
    \desc[german]{misc}{}{}
    \begin{formula}{impedance_r}
        \desc{Impedance of an ohmic resistor}{}{\QtyRef{resistance}}
        \desc[german]{Impedanz eines Ohmschen Widerstands}{}{}
        \eq{Z_{R} = R}
    \end{formula}
    \begin{formula}{impedance_c}
        \desc{Impedance of a capacitor}{}{\QtyRef{capacity}, \QtyRef{angular_velocity}}
        \desc[german]{Impedanz eines Kondensators}{}{}
        \eq{Z_{C} = \frac{1}{\I\omega C}}
    \end{formula}

    \begin{formula}{impedance_l}
        \desc{Impedance of an inductor}{}{\QtyRef{inductance}, \QtyRef{angular_velocity}}
        \desc[german]{Impedanz eines Induktors}{}{}
        \eq{Z_{L} = \I\omega L}
    \end{formula}

    \TODO{impedance addition for parallel / linear}
