H Veeder <hveeder...@gmail.com> wrote:
> Consider the difference between the sun at noon and the sun at dawn/dusk. > The interior of the HotCat glows white but from the outside it glows red > like a sunrise because it is shinning through an atmosphere of alumina. > It does not work that way. If the outside surface temperature really is 1400 deg C, then the outside surface material should be incandescent white. It does not matter what the inside temperature is. All materials glow with the same incandescent color at a given temperature. That is what the textbooks claim. I doubt any light is shining through the alumina, but even if it is, the light from incandescence of the outside alumina material itself should be white. - Jed
