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At 11:31 PM -0700 10/19/02, John Mallinckrodt wrote:
>It is interesting, however, to note that his argument might well
*seem* to apply equally well to sound waves; the reason it doesn't is
a little subtle. To his credit, he does *say* that it doesn't apply
to waves that require a medium, but he doesn't explain why.
This 'subtlety' can be cleared up by stressing the postulate
of c being constant. For waves that utilize a medium - this is not
the case.