A standing wave is formed by the superposition of two waves travelling in opposite directions. The transverse displacement is given by |
What is the speed of the travelling wave moving in the positive x direction? |
(x and t are in meter and second, respectively.) [JEE Online 09-04-2017] |
A) 120 m/s
B) 90 m/s
C) 160 m/s
D) 180 m/s
Correct Answer: C
Solution :
[c] \[V=\frac{w}{k}\] |
\[=\frac{200\pi }{5\pi /4}\,=160\] |
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