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In a plane electromagnetic wave, the ele...

In a plane electromagnetic wave, the electric field oscillates sinusoidally with a frequency of `2 xx 10^10` Hz and amplitude `48 Vm^(-1)`
Calculate the average energy density of the electromagnetic field of the wave .

Text Solution

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Average energy density
`U_(av) = 1/2 in_0 E_0^2`
` =1/2 xx 8.85 xx 10^(-12) xx 48 xx 48`
`=1 xx 10^(-8) Jm^(-3)`
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