Longitudinal waves

[abhinavjeet]

In a longitudinal wave is a compression pulse always followed by a rarefaction on its tail

 

[tech99]

In a longitudinal wave is a compression pulse always followed by a rarefaction on its tail

It is possible to have just one direction of pulse but then the whole system has moved forward statically. For electrical transmission lines we have created a DC component. A balanced system of pulses (maybe 3 for instance) has no residual DC component. This would be obtained if the transmission line is driven via a DC blocking capacitor.