Bill and I both muddled the exponent of 10 for the speed of light in free space. It is not 10, or 9, but 8.
That is: The correct value is c is 3 x 10^8 m/s (with better than 1% accuracy). Gene Mechtly. ---- Original message ---- >Date: Tue, 15 Jan 2008 12:49:23 -0600 (CST) >From: <[EMAIL PROTECTED]> >Subject: [USMA:40065] Re: Stuart & Sons Pianos >To: "U.S. Metric Association" <[email protected]> >... 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...
