Displacement y of a wave travelling in x- direction is given by y = {10^{ - 4}}sin left( {600t

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14.Waves and Sound

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The displacement $y$ of a wave travelling in the $x-$ direction is given by $y = {10^{ - 4}}\sin \left( {600t - 2x+\frac{\pi }{3}} \right)$ metre, where $x$ is expressed in metres and $t$ in seconds. The speed of the wave in $ms^{-1}$, is

A

$300$

B

$600$

C

$1200$

D

$200$

Solution

Wave speed $=\frac{\omega}{\mathrm{k}}=\frac{600}{2}=300 \mathrm{\,m} / \mathrm{s}$

Standard 11

Physics

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