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

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Average total Energy density, $U = \varepsilon _{0}E_{rms}^{2}$

$U = 8.85\times 10^{-12} \times 720^{2}$

$U = 4.58\times 10^{-6} \; J/m^{3}$

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