In a plane EM wave, the electric field oscillates sinusoidally at a frequency of 5 × 10^10 Hz and an amplitude of 50 Vm^-1. The total average energy…

In a plane EM wave, the electric field oscillates sinusoidally at a frequency of $\displaystyle 5 \times 10^{10} \mathrm{~Hz}$ and an amplitude of $\displaystyle 50 \mathrm{Vm}^{-1}$. The total average energy density of the electromagnetic field of the wave is : $\displaystyle \left[\right.$ Use $\displaystyle \left.\varepsilon_0=8.85 \times 10^{-12} \mathrm{C}^2 / \mathrm{Nm}^2\right]$