P18_079 - 79. (a) With r = 10 m in Eq. 18-28, we have I= P...

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79. (a) With r = 10 m in Eq. 18-28, we have I = P 4 πr 2 = P =10W . (b) Using that value of P in Eq. 18-28 with a new value for r ,weobta in I = P 4 π (5 . 0) 2 =0 . 032 W m 2 . Alternatively, a ratio I 0 /I =( r/r 0
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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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