How can a blue white light be produced in an experiment that uses resistant heat at 350C. Is the reaction producing a laser like effect? The measured heat at 350C and the observation of a 5000K light source does not make sense to me. It is not blackbody or is it?
Jack said he had a hot coil (filament) inside. The coil (filament) may be well above 1000°C. The light from that high temperature coil (filament) is transmitted through the cooler alumina shell, which is at 350°C. Then you end up with a spectrum from the transmitted light from the hot coil (filament) plus the blackbody spectrum emitted by the 350°C alumina shell.