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The rms value of the electric field of a...

The rms value of the electric field of a plane electromagnetic wave is 314V/m. The average energy density of electric field and the average energy density are

A

`4.3 xx10^(-7) Jm^(-3),2.15 xx10^(-7) Jm^(-3)`

B

`4.1 xx10^(-7) Jm^(-3),8.6 xx10^(-7) Jm^(-3)`

C

`2.15 xx10^(-7) Jm^(-3),4.3 xx10^(-7) Jm^(-3)`

D

`8.6 xx10^(-7) Jm^(-3),4.3 xx10^(-7) Jm^(-3)`

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