On Thu, Oct 15, 2020 at 9:16 AM JonesBeene <jone...@pacbell.net> wrote:
> If you haven’t seen it- this entry below addresses the semantics issue, > which is the bulk of the problem of cold radiation. > > > > > https://physics.stackexchange.com/questions/193054/thermodynamics-possibility-of-cold-radiation > > > Before the current understanding of radiation and heat mostly solidified into a consensus in the second half of the 19th century, there were deep disagreements about the nature of heat and radiation which could not be resolved semantically. BTW It is important to keep in mind that there is a distinction between the laws of thermodynamics and theories of heat and radiation, because it is possible that the latter could change again without violating the former. One commenter at the link reasoned: <<If cold radiation is physically real, then it ought to be possible to produce temperatures below 0 Kelvin (absolute zero), simply by focusing enough of them, just as a solar furnace can produce extremely high temperatures by use of a mirror. The fact that this does not happen ought to be a clue.>> I have thought about this too, but I think this is a strawman argument. The commenter presumes that if cold radiation is real, then it must necessarily be the mirror image of hot radiation. Harry > A related and possibly more interesting problem is that of “cold > electricity” which supposedly is a concept which goes back to Tesla (the > guy not the car). > > > > Indeed “cold electricity” can be identified with hole carriers instead of > electrons … but this is not the same as cold radiation (unless you want to > define it that way)/ > > > > But if it is real, then maybe cold electricity should be called > “holicity” > > > > 😊 > > > > > > > > *From: *Bob Higgins <rj.bob.higg...@gmail.com> > > > > Could the "cold radiation" be considered something like hole carriers in a > semiconductor? > > > > On Wed, Oct 14, 2020 at 1:29 PM H LV <hveeder...@gmail.com> wrote: > > In my estimation Rumford's theory is the seed of an alternate theory of > radiation. It could still grow and blossom into a well > developed mathematical theory of heat. > > I am interested in beat theory because it resonants (pun intended) with > Rumford`s theory of hot and cold radiation, since > > both involve _differences_. A beat frequency is given by the difference > of two frequencies and in Rumford`s theory two types of differences are > important.The first is that the relative difference in temperature between > two bodies determines which body is producing more hot or more cold > radiation. The second is that the sign and magnitude of the difference > between the received frequency and the oscillator's frequency determines > whether the radiation increases or decreases the energy of the oscillator. > > > > Harry > > >
