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  • The rms value of the electric field of the light coming from the sun is .

The rms value of the electric field of the light coming from the sun is 720 \mathrm{NC}^{-1}. The average total energy density of the Electromagnetic Wave is

Option: 1

4.58 \times 10^{-6} \mathrm{Jm}^{-3}


Option: 2

6.37 \times 10^{-9} \mathrm{Jm}^{-3}


Option: 3

81.35 \times 10^{-12} \mathrm{Jm}^{-3}


Option: 4

3.3 \times 10^{-3} \mathrm{Jm}^{-3}


Answers (1)

best_answer

\mathrm{\begin{aligned} \text { Total average energy } & =\varepsilon_0 E_{\mathrm{rms}}^2 \\ & =8.85 \times 10^{-12} \times(720)^2 \\ & =4.58 \times 10^{-6} \mathrm{Jm}^{-3} \end{aligned}}

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shivangi.bhatnagar

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