Much of the red glow is confined to the central part of the alumina vessel, but there are areas where the red glow extends to the exterior surface of the vessel. Is all the red glow near the exterior surface just diffusion of red light from the central part due to the alumina's translucency or could some of it be indicative of the surface temperature in those areas?
Harry On Tue, Oct 14, 2014 at 11:36 AM, Alan Fletcher <[email protected]> wrote: > It has moderate transmissivity in the visible range, which is what the > photograph shows. But it drops to zero by 6 and above, which is what the > IR camera is measuring. > > So there could be visible shadows / glowing resistors seen through the > ceramic, but the IR calculations are OK. > > ------------------------------ > *From: *"H Veeder" <[email protected]> > *Sent: *Monday, October 13, 2014 11:27:44 PM > >> He commented: "My interpretation of figure 6 is that the tranmissivity of >> alumina goes down to zero. Hence, this shows the arguments about alumina >> translucency are moot." >> > > ​does this imply the dark bands are not cast shadows? > > Harry > > >
