The magnetic field of a plane-polarized electromagnetic wave moving in the z-direction is given by 
in SI units. Find the average power per square meter carried by the EM wave.
A. 720 W
B. 172 W
C. 500 W
D. 2 × 107 W
E. 86 W
Answer: B
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Fill in the blank(s) with the appropriate word(s).
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