Robin van Spaandonk wrote: > > In reply to Frederick Sparber's message of Wed, 26 Oct 2005 > 05:40:57 -0500: > Hi, > [snip] > >> Now that said, I fail to see why momentum can't be conserved > >> between a molecule and an emitted photon. IOW why doesn't H > >> recombine under emission of UV? > >> > >Moot point. Where is Ronny Bar-Gadda going to get the mole of 4.525 plus a mole of 5.17 eV > >UV photons to split the H-OH and O-H bonds respectively, when you can take advantage > >of the free energy of auto-ionization of water and use ~2.0 eV to separate them? > > > >Or the Iodine-Sulfur thermal water-splitting process. > > > >Pie in the sky? :-) > > > >FJS > It may be a moot point, but I still want to know the answer. > My best shot at that first would be a look at the momentum of the photon, mc = E/c and the momentum of the atom/molecule mv from Boltzman's K.E. = 0.5 mv^2 = kT. Then a look at the Raman Effect, Compton Effect, and the Lamb Shift. If memory serves there was an experiment ( ca. 1980) that involved an infrared laser shined on a gas and the frequency shift noted. This was done at the Arizona University where Willis Lamb was on staff. Google away, Robin. :-) Fred > > Robin van Spaandonk > > http://users.bigpond.net.au/rvanspaa/ > > Competition provides the motivation, > Cooperation provides the means.
