In reply to David Roberson's message of Thu, 23 Jan 2014 17:41:12 -0500 (EST): Hi, [snip] >Robin, there is only one lower frequency where radiation is not possible and >that is zero radians per second. If you believe that some other frequency >exists that is a threshold how would that be determined? What in nature would >separate one frequency from the next so that a well defined chasm is found?
The lower limit is not a limit on frequency. I used the term "lower limit" to indicate that something special happens with EM radiation when you reach atomic dimensions. Photons have h_bar angular momentum. If your system can't deliver that then you can't make a photon. Essentially all macroscopic systems easily can, however for atoms it becomes impossible below the ground state. Hence (IMO) the reason for the "ground" state. Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html
