On Mon, May 27, 2013 at 4:33 PM, MarkI-ZeroPoint <zeropo...@charter.net>wrote:
> Jed:**** > > More importantly, why is he using the emissivity of stainless steel, when > the outer cylinder is painted ceramic, NOT stainless steel!!! > Since it's painted, it doesn't make any difference what was painted. > ** ** > > Yes, all metals have low emissivity, but that is irrelevant when a metal > is NOT what is ‘emissiviting’ (to coin a word)! J **** > > Ceramics have a much higher emissivity.**** > > ** > But we have no idea what the emissivity of the paint used in the December test was, nor whether it was wavelength dependent. There may be a paint for which an assumption of emissivity of 1 greatly overestimates the power. A few measurements could have excluded this possibility.
