I'm bit confussed but still! My Question is:-

When I speak person in front of me, my words travel in the form of sound waves in every possible direction including the listner; How does the Feynman law of particles applied here? Is it possible that even after end of communication waves of my sound source keep travelling in every direction?

Do waves ever stop? If yes, that is your answer, If no what happens to the waves?

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Originally Posted by shiv.srp

I'm bit confussed but still! My Question is:-

When I speak person in front of me, my words travel in the form of sound waves in every possible direction including the listner; How does the Feynman law of particles applied here? Is it possible that even after end of communication waves of my sound source keep travelling in every direction?

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My guess is that you are making reference to Feynman's famous Sum Over Histories formulation.

http://www.en.wikipedia.org/wiki/Pat...lity_amplitude

Feynman's formulation is better know as a quantum explanation for probability amplitude (as applied to the wave/particle duality problem). Apparently it is also useful for working out other probabilities using more conventional explanations. Perhaps this is what you had in mind?

A particle can always travel between two distinct points but according to Feynman it can so travel at the same time in a infinite number of different paths.Probabilities can be encoded in a wave form. As the waves spread out they interfere and cancel each other out. The path that survives is the most likely in terms of probability. In other words the path actually taken by the particle.

Perhaps it boils down to whether you are asking for a quantum explanation of sound or a more conventional explanation?


Tut