question_answer

In an electromagnetic wave, the amplitude of electric field is 1 V/m. The frequency of wave is \[5 \times  1{{0}^{14}}Hz\]. The wave is propagating along z-axis. What will be the average energy density of electric field, in\[joule/{{m}^{3}}\]?

Answer:

\[\left( 2.21\times 1{{0}^{-}}^{12} \right)\]