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Re: [Phys-l] sound waves and beam flexures



--- On Wed, 2/24/10, John Denker <jsd@av8n.com> wrote:


Really?  How do you know?  How sure are you of that?
Have you done the calculation?  Have you done the experiment?
 
  All of this is not the answer to the question asked. As to calculation, it had been done by many people before me. For each frequency, a spherical wave can be represented as a linear superposition (3-D Fourier transform) of plane waves with the same frequency. If each plane wave is non-dispersive, how their linear superposition becomes dispersive?
 
Moses Fayngold,
NJIT

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