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Assertion : In longitudinal wave pressure is maximum at a point where displacement is zero. Reason : There is a phase difference of
π
2
\frac{\pi}{2}
2
π
between
y
(
x
,
t
)
y(x, t)
y
(
x
,
t
)
and
Δ
P
(
x
,
t
)
\Delta P(x, t)
Δ
P
(
x
,
t
)
equation in case of longitudinal wave.
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