Wave motionHardBloom L3

Question

A wave pulse is given by the equation y = f(x, t) = A exp (–B(x–vt)2). Given A =1.0m, B = 1.0 m–2 and v = + 2.0 m/s, which of the following graph shows the correct wave profile at the instant t = 1 s?

Options

A.
B.
C.
D.

Solution

Sol. y = A$e^{\lbrack - B(x - {vt})^{2}\rbrack}$ A = 1, B = 1, v = 2m/s.

At t = 1sec.

y = $e^{\lbrack - (x - 2)^{2}\rbrack}$

y = $e^{\lbrack 4x - x^{2} - 4\rbrack}$

At t = 1 sec

y = 1 at x = 2 point of maxima

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