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An electromagnetic wave fo frequency `1xx10^(14)` Hz is propagating along z - axis. The amplitude of the electric field is `4V//m`. If `epsilon_(0)=8.8xx10^(-12)C^(2)//N-m^(2)`, then the average energy density of electric field will be

A

`35.2xx10^(-12)J//m^(3)`

B

`35.2xx10^(-10)J//m^(3)`

C

`35.2xx10^(-11)J//m^(3)`

D

`35.2xx10^(-13)J//m^(3)`

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The correct Answer is:
A
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