Equation of progressive wave is given by y = a sin π(40 t – x) where a and x are in meter and t in
second. The velocity of the wave in (m/s) is -
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-x its totally wrong my answer
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y=a sinπ(2t−4x)
Compare this with standard equation, y=A sin 2π(Tt−λx)
where, A= amplitude
λ= wavelength = 4
T= time period = 2
T1=21=0.5
f= frequency
f=T1=0.5
f= 0.5 Hz
Wave velocity, v=f×λ
v=0.5×4=2cm/s
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