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[" 17.The rus value of the electric held...

[" 17.The rus value of the electric held of a plane "],[" electromagnetic wave is "314V/m" .The average "],[" energy density of electric fleld ind the "],[" sivernge energy density are "],[" 1) "4.3times10^(-7)Jm^(-3):2.15times10^(-1)Jm^(-3)],[" 2) "43times10^(-7)Jm^(-3):8.6times10^(-1)Jm^(-3)],[" 3) "2,15times10^(-7)Jm^(-3):4.3times10^(-7)Jm^(3)]

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