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abhijitdashBest ResponseYou've already chosen the best response.0
dw:1333035994637:dw how does this show a longitudinal wave?
 2 years ago

mos1635Best ResponseYou've already chosen the best response.2
the diagramme shows the value of distanse from rest point dw:1333038571923:dw
 2 years ago

shubhamBest ResponseYou've already chosen the best response.0
I think you are asking  Why do we have a sinusoidal graph of a wave that has particles vibrating longitudnally ? See, the sinusoidal graph is a displacement, Y Vs. Time, t graph. The general equation of such graphs are of the form \[Y = Ymax. \cos (\omega.x  Kt )\]
 2 years ago

Mani_JhaBest ResponseYou've already chosen the best response.2
As mos1635 says, the sine form representation is not a picture of the wave. It shows the variation of the displacement of the wave with respect to time. It is a consequence of the fact that waves are simple harmonic motions, and thus can be represented by harmonic functions(sine or cosine).
 2 years ago

Mani_JhaBest ResponseYou've already chosen the best response.2
Both latitudinal and longitudinal wave functions can be represented thus. But it does not give the 'picture' of the wave(Though for waves on a string, it coincidentally does). Similarly the displacementtime graph of a particle does not show the actual path taken by a particle. It shows the relationship between distance covered and time taken, and how that relationship varies with time.
 2 years ago
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