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

Question

$4.425 \times 10^{-8} \mathrm{Jm}^{-3}$

$2.212 \times 10^{-10} \mathrm{Jm}^{-3}$

$2.212 \times 10^{-8} \mathrm{Jm}^{-3}$

$1.106 \times 10^{-8} \mathrm{Jm}^{-3}$

Solution

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