ch33-p099 - 99. (a) The wave is traveling in the y...

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(b) Figure 33-5 may help in visualizing this. The direction of propagation (along the y axis) is perpendicular to G B (presumably along the x axis, since the problem gives B x and no other component) and both are perpendicular to G E (which determines the axis of polarization). Thus, the wave is z -polarized. (c) Since the magnetic field amplitude is B m = 4.00 µ T, then (by Eq. 33-5) E m = 1199 V/m 3 1.20 10 V/m ≈× . Dividing by 2 yields E rms = 848 V/m. Then, Eq. 33-26 gives I I c E == × 0 3 191 10 rms 22 W/m .. (d) Since kc =
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