Jed and Dave- Glass is not a black body in my estimation, and I would expect it to look different at any given temperature from a true black body. If Mizuno's correspondence with you Jed was relative to glass experience, I would say it is not applicable to a like-temperature black body. My thought would be that a metal that looked black to start with would be closer to a black body than a shiny silvery or gold one. However, its been years since I have reviewed the detailed electric and magnetic parameters of a substance that make it a black body.
It would seem to me that resonant vibrational lattice parameters for whatever the material in question should skew the absorption and emission spectrum for that particular body and, hence, change the spectrum that escapes the particular body in question, relative to a black body. I think a black body absorbs and emits radiation at all visible frequencies without preference for any particular frequency. I do not think that is true for glass, since it is transparent to most visual light. Bob Cook ----- Original Message ----- From: Jed Rothwell To: [email protected] Sent: Saturday, October 18, 2014 11:18 PM Subject: Re: [Vo]:Color Temperature David Roberson <[email protected]> wrote: Do metals appear differently than the materials that Mizuno was viewing? Nope. As I said, all materials are incandescent at about the same color. It is only temperature dependent. - Jed
