The rms value of electric field of the Light coming from the sun is 720 N/C. The average total energy density of the electromagnetic wave is

• A

  $4.58\times {10}^{-6}\mathrm{J}-{\mathrm{m}}^{-3}$

• B

  $6.37\times {10}^{-9}\mathrm{J}-{\mathrm{m}}^{-3}$

• C

  $81.35\times {10}^{-12}\mathrm{J}-{\mathrm{m}}^{-3}$

• D

  $\mathit{3}\mathit{.3}\mathit{\times }{\mathit{10}}^{\mathit{-}\mathit{3}}J\mathit{-}{m}^{\mathit{-}\mathit{3}}$