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Re: wave momentum

"James W. Wheeler" wrote:
But the Maxwell tape ad is about a longitudinal wave that carries enough
momentum to drive (e.g.) a pick up microphone.

It carries enough *energy* to drive a microphone. I don't think there
is a net change in the velocity of the microphone (and hence in it's
momentum). First increased pressure pushes it one way, then decreased
pressure pulls it the other.

--
--James McLean
jmclean@chem.ucsd.edu
post doc
UC San Diego, Chemistry