Two waves \( \quad y_{1}=A \cos (0.5 \pi x-100 \pi t) \quad \) and ...

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Two waves \( \quad y_{1}=A \cos (0.5 \pi x-100 \pi t) \quad \) and \( y_{2}=A \cos (0.46 \pi x-92 \pi t) \) are travelling in a pipe placed
\( \mathrm{P} \) along \( x \)-axis. Find the number of times intensity is maximum in time interval of \( 1 \mathrm{sec} \)
[IIT-JEE 2006]
W
(a) 4
(b) 6
(c) 8
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