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[> Marks] (B) Consider an electromagnetic wave in free space whose electric field is given by E(x, t) = 30exp[-i(67 x 10't - 0.4nz)] where

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[> Marks] (B) Consider an electromagnetic wave in free space whose electric field is given by E(x, t) = 30exp[-i(67 x 10't - 0.4nz)] where all the quantities are in SI units. Determine the phase velocity of the wave. the frequency and the magnetic field of the wave. [5 Marks]

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