1502 
For convenience, at this point we define the phase 
angle € by: 
eh yy y Hf , 2 a a Ve" 
Lan é * AA A Fe) (47) 
This is identical with the angle previously identified as the 
phase shift in the simple harmonic treatment. Also let 
ba. 
= La I ~) 
M = oe oe (48) 
We now express A and B in terms of the Fourier 
transforms of A: 
Ate) = Cr [ Yeu) ep (isu) deo 
(49) 
4B / 1 (ws) exp(can) Ac 
Ba)= Gd" [ Lt Moye) da 
where, 
pes) ~ Ge) [gior) ep lin) dv, 
Dividing equation (45) by M and utilizing (47), 
(49), and (50), we have: 
SM, tf, («) S74 COSi= se see 
Last fies. medal 
~ 26 
¢ 
