p34_019 - 19. (a) The average rate of energy ow per unit...

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19. (a) The average rate of energy flow per unit area, or intensity, is related to the electric Feld amplitude E m by I = E 2 m / 2 µ 0 c ,so E m = p 2 µ 0 cI = q 2(4 π × 10 7 H / m)(2 . 998 × 10 8 m / s)(10 × 10 6 W / m 2 ) =8 . 7 × 10 2 V / m . (b) The amplitude of the magnetic Feld is given by B m = E m c = 8 . 7 × 10 2 V / m 2 . 998 × 10 8 m / s =2 . 9 × 10 10 T . (c) At a distance r
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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