At t = 0, a transverse wave pulse in a wire is described by the function y=6(x2−3) where x and y are in metres. The function y(x, t) that describes this wave equation if it is travelling in the positive x direction with a speed of 4.5 m/s is
A
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B
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C
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D
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Solution
The correct option is D y(x,t)=a(x±vt)2+b Is another form of progressive wave equation propagating with a speed v. Negative sign to be taken for propagation along + x – axis and positive sign to be taken to propagation along – x – axis.