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Q)

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 wave is :


( A ) $3.3 \times 10^{-3} \; J/m^3$
( B ) $6.37 \times 10^{-9} \; J/m^3$
( C ) $4.58 \times 10^{-6} \; J/m^3$
( D ) $81.35 \times 10^{-12} \; J/m^3$

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