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(20 points) A plane electromagnetic wave traveling in the positive z direction produces a signal in the oscilloscope shown in
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Wavelongth O.004 m PAngyar 9ITY 2ITA3X/0& freguoncy 4.71X 10ads o.D0Y o-00y k- 21T 911 length 1-tS m Aogule Jave 0.004 4. - 2

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