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Two waves are generated at the two ends ...

Two waves are generated at the two ends of a string whose length is given to be d as shown in the diagram. It is known that they are going to interfere constructively after some time t as shown. What is t in term of the velocity of waves `v ge l`?

Text Solution

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Let us say wave on the left side travels a distance l= vt
Wave on the right side travels

`implies d-l-lambda=vt`
`implies d-lambda=2vt`
`implies (d-lambda)/(2v)=t`
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