Question: Consider the imaginary rectangular box shown in Fig. 7-19 (P7.31). (a) Determine the net power flux P (t) entering the box due to a plane

Consider the imaginary rectangular box shown in Fig. 7-19 (P7.31).
(a) Determine the net power flux P (t) entering the box due to a plane wave in air given by

(b) Determine the net time-average power entering the box.

E = REo cos(or - ky) (V/m).

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