Gene: Below, you wrote "but *always* less than c = 3 x 10^m/s."
I guess you meant 3 x 10^8 m/s. Bill Potts Roseville, CA http://metric1.org [SI Navigator] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Tuesday, January 15, 2008 10:49 To: U.S. Metric Association Subject: [USMA:40065] Re: Stuart & Sons Pianos True, but only for a particular medium. In other media, the relationships of frequency and wavelength are different. i.e. where the speeds ("phase velocities") of wave propagation are different. But always: "phase velocity" = frequency times wave length at each particular frequency. However, the "group velocity" of a packet of waves of many frequencies which superpose to form pulses of various shapes can range from near zero to very large numbers, but *always* less than c = 3 x 10^m/s. Travel of a pulse on a string (a plucked string), or an object in space at speeds greater than c is fascinating imagination, but is pure science fiction. Although this is possibly more than retains your interest, the point is that each frequency does not have a specific wavelength as Stanley asserts. ---- Original message ---- >Date: Tue, 15 Jan 2008 06:43:31 -0500 >From: "STANLEY DOORE" <[EMAIL PROTECTED]> >Subject: [USMA:40057] Re: Stuart & Sons Pianos >To: "U.S. Metric Association" <[email protected]> > > Each frequency specified in Hertz has a specific > wave length....
