p41_068 - 68. (a) The radius of the central disk is R=...

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68. (a) The radius of the central disk is R = 1 . 22 d = (1 . 22)(3 . 50 cm)(515 nm) 3 . 00 mm =7 . 33 µ m . (b) The average power flux density in the incident beam is P πd 2 / 4 = 4(5 . 00 W) π (3 . 00 mm) 2 = 707 kW
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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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