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59. Since the energy is proportional to the amplitude squared (see Eq. 1521), we find the
fractional change (assumed small) is
==
2
=2
.
2
22
′ −
≈
EE
E
dE
E
dx
x
xd
x
x
dx
x
m
m
mm
m
m
m
Thus, if we approximate the fractional change in
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.
 Spring '08
 Any
 Physics, Energy

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