ch33-p017 - 17. (a) The average rate of energy flow per...

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(c) At a distance r from the transmitter, the intensity is 2 /2 , I Pr = π where P is the power of the transmitter over the hemisphere having a surface area 2 2 r π . Thus () ( ) 2 26 2 3 22 m 1 0 1 0 W / m 6 . 3 1 0 W . I 3− =π =π1 0 × 1 0 × = × 17. (a) The average rate of energy flow per unit area, or intensity, is related to the electric field amplitude E m by
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