p34_088 - 88. (a) At r = 40 m, the intensity is I = = = 2 P...

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88. (a) At r = 40 m, the intensity is I = P πd 2 / 4 = P π ( θr ) 2 / 4 = 4(3 . 0 × 10 3 W) π [(0 . 17 × 10 3 rad)(40 m)] 2 =8 3W / m 2 . (b) P 0 =4
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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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