David Roberson <[email protected]> wrote:
> Why would you expect the device to look white hot when a known metal > casting looks orange hot at approximately the same temperature? What am I > missing? > I think you are wrong. Mizuno and one other person with experience working with glass told me that 1300 deg C incandescence is white. That is what this and other references show: http://en.wikipedia.org/wiki/Incandescence#mediaviewer/File:Incandescence_Color.jpg Incandescence in all materials including solids and liquids has about the same color. The color is independent of the material. Mizuno said materials at 1300 deg C are so bright, they will hurt your eyes if you look at them. You need a welder's mask. As noted, we do not known when the photo was taken. I would say the temperature is 800 to 900 deg C. That is more than the calibration temperature. Maybe this was at the beginning of the test, before excess heat turned on. I have the impression from the graphs that it turns on quickly, so I doubt that is the case. If the authors do not address this question and tell us what color it was, after a while I am going assume they made a mistake, and I am going to ignore this test. - Jed
