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16 Mar 2010 14:25:19 IST

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waves travel by collision of particles, but wave velocity is constant while particle veloc

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waves travel by collision of particles, but wave velocity is constant while particle velocity varies b/w a maxima n minima. does dis mean dat d collision is not elastic?

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Vivek V Bhatnagar

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Joined: 15 Oct 2009

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18 Mar 2010 13:40:04 IST

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I suppose you are referring to material waves like sound waves etc.

Such waves do not travel by collisions between particles but because of the elastic properties (like Young's Modulus etc that arise out of the electromagnetic forces between molecules ) and inertial properties (like density) of the medium in which they propagate

therefore the question of elastic or inelastic collisions doesn't arise

particle velocity varies with time because under the influence of the electromagnetic forces the particles execute simple harmonic motion

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