I think you may be confusing two effects here. On 02/08/2010 01:07 PM, Jones Beene wrote: > -----Original Message----- From: Stephen A. Lawrence > > Jones Beene wrote: > > > >> I have lost the citation from a few weeks ago that claimed that >> below a threshold of about 10 nm, the expected blackbody frequency is >> upshifted for nanostructures, in general.
This is to say the spectrum shifts -- the spectrum of a mass of nanoparticles won't be a BB spectrum. > >> SAL: If I understand you, and if this is true, then it's a >> violation of the second law of thermodynamics. > > No, not if other parts of the structure compensate, so that the net > energy is unchanged. > > IOW sub-radiance compensates for super-radiance ... As far as I can tell, super-radiance is something quite different from a spectrum shift. It has to do with stronger radiation than predicted for a blackbody, typically for a short period of time due to special circumstances. A laser may provide an example of this. My comments all addressed the issue of a BB spectrum shift, and were not related to superradiance.
