English: Electric Dipole Radiation, Dipole parallel to the z-axis, electric field and poynting-vector in the x-z-plane. Colours indicate the strength of the electric field vector ${\displaystyle E={\sqrt {E_{x}^{2}+E_{z}^{2}}}}$, ${\displaystyle (E_{y}=0)}$, red colours indicate ${\displaystyle E_{z}>0}$, blue colours ${\displaystyle E_{z}<0}$. The black arrows show ${\displaystyle (S_{x},S_{z})}$. As E and S become very large in the center of the dipole they are limited to a certain value.