1.

A transverse wave is represented by the equation y = y sin (2pi)/lambda (vt -x)For what value of lambda , is the maximum particle velocity equal to two times the wave velocity?

Answer»

`lambda = (pi y_(0))/2`
`lambda = (pi y_(0))/3`
`lambda = 2pi y_(0)`
`lambda = pi y_(0)`

Solution :The given equation of wave is:
`y =y_(0)sin (2pi)/lambda (vt -X)`
Particle VELOCITY `=(DY)/(dt) = y_(0)COS (2pi)/lambda (vt-x) .(2PIV)/lambda`
`((dy)/(dt))_("max") = y_(0).(2pi)/lambda v`
`therefore y_(0) =(2pi)/lambda v =2 v` or `lambda = pi y_(0)`


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