v 2.28

$${I = \frac{1}{T} \int_0^T |S| dt = \frac {1}{2} c \varepsilon_0 E_0^2= \frac {1}{32 \pi^2 \varepsilon_0} \frac{\omega^4 p_0^2 \sin^2 \theta}{c^3 r^2}}$$