An electromagnetic wave has an electric field given by $vec{E}(y, t) = left[ 3.15 imes 10^5 ext{V/m} cos(ky - (1.000 imes 10^{13} ext{rad/s})t) ight] hat{k}$.
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15 x 10^8 V/m cos(ky (1.000 x 10^11 rad/s)t). Show more…
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