Hi
I have a problem with task c)
For the Poynting vector ##\vec S## and the energy density ##\omega## I got the following:
$$\vec S= \frac{1}{\mu_0} \frac{4 I_0^2}{c \varrho} \frac{t}{c^2 t^2 - \varrho^2} \Theta(ct-\varrho)^2 \vec{e}_\varrho$$
$$\omega= \frac{1}{2} \epsilon_0 \frac{4 I_0^2...