Formula_20910

\[\boldsymbol{E}_{\omega}=\frac{c}{i \omega \varepsilon \mu}\left(\nabla \operatorname{div} \boldsymbol{A}_{\omega}+\frac{\varepsilon \mu \omega^{2}}{c^{2}} \boldsymbol{A}_{\omega}^{2}\right), \quad \boldsymbol{B}_{\omega}=\operatorname{rot} \boldsymbol{A}_{\omega} .\]