Rick Monteverde wrote: > The hot (1800+ degF) and warm (1450+ degF) glass I've worked with always > stays clear. Glass from a furnace is extremely clear, you can look at the > bottom of the pot and it looks like there's nothing in there.
In this case it's presumably also not glowing, or at least not much, and that would seem to fit with the claim that it absorbs just as it radiates. > > The really weird thing is when gold metal gets translucent. Noticed it for > years but never believed my eyes were telling me the truth. Say what?? Could you please provide more info on this? This teaser is a killer! > > R. > >> -----Original Message----- >> From: Stephen A. Lawrence [mailto:sa...@pobox.com] >> Sent: Wednesday, July 22, 2009 3:38 AM >> To: vortex-l@eskimo.com >> Subject: [Vo]:Question about hot glass >> >> I ran across an explanation of a "blackbody" which I actually >> understood a week or so back (totally unexpected, it was in >> the introductory chapter to a QM book), and since then I've >> been fiddling around with gedanken experiments involving >> black boxes with little holes in them and the second law of >> thermodynamics. >> >> And it appears to me that, according to the second law of >> thermodynamics, if glass is heated red-hot or orange-hot, and >> it's actually seen to be glowing orange, it should also turn >> *opaque* to visible light while it's at that temperature. >
