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16.70:
(See Problems 16.66, 16.74, 16.67).
a) In a time
t
, the wall has moved a
distance
t
v
1
and the wavefront that hits the wall at time
t
has traveled a distance
vt
, where
,
0
0
λ
f
v
=
and the number of wavecrests in the total distance is
.
0
1
)
(
λ
+
t
v
v
b) The reflected
wave has traveled
vt
and the wall has moved
,
1
t
v
so the wall and the wavefront are
separated by
.
)
(
1
t
v
v
-
c) The distance found in part (b) must contain the number of
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Unformatted text preview: reflected waves found in part (a), and the ratio of the quantities is the wavelength of the reflected wave, 1 1 v v v v +-λ . d) The speed v divided by the result of part (c), expressed in terms of 1 1 is v v v v f f +-. This is what is predicted by the problem-solving strategy. . e) 1 1 1 1 2 v v v v v v v f f f--+ =-...
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