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Unformatted text preview: 73. (a) Eq. 345 gives E = cB , which relates the ﬁeld values at any instant – and so relates rms values to
rms values, and amplitude √
values to amplitude values, as the case may be. Thus, Erms = cBrms =
16.8 V/m. Multiplying by 2 yields the electric ﬁeld amplitude Em = 23.7 V/m.
(b) We use Eq. 3426:
I= 1
2
E 2 = 0.748 W/m .
µ0 c rms ...
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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.
 Fall '08
 SPRUNGER
 Physics

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