electromagnetic_waves - z B t B B cos f 2 f c c f c f 2 2 2...

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Electromagnetic Waves Given: m 3 . 0 Find: ? z B 2 / 45 m W I ns t 5 . 1 A plane monochromatic radio wave ( = 0.3 m) travels in vacuum along the positive x-axis, with a time-averaged intensity I = 45 W/m 2 . Suppose at time t = 0, the electric field at the origin is measured to be directed along the positive y-axis with a magnitude equal to its maximum value. What is B z , the magnetic field at the origin, at time t = 1.5 ns? Solutions a.) To find we can use the following formula:
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