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86. When
φ
= 0 it is clear that the superposition wave has amplitude 2∆
p
m
. For the other cases, it is useful
to write
∆
p
1
+∆
p
2
=∆
p
m
(sin(
ωt
) + sin(
ωt
−
φ
)) =
µ
2∆
p
m
cos
φ
2
¶
sin
µ
ωt
−
φ
2
¶
.
The factor in front of the sine function gives the amplitude for all cases considered:
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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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