Looking for a picture of black body radiation from an oven

[lalbatros]

Hello,

looking for a picture of black body radiation from an oven

Years ago I had found a nice illustration.
An opened hot oven was shown.
The pottery inside could hardly be seen.
This illustrated what I believe is one of most important aspect of a black body.
If is specially useful to illustrate the origin and role of the "view factor".
Indeed, would the objects be replaced by a plate, a sphere, or anything else, the picture would remain the same if the thermal equilibrium conditions are satisfied. Objects cannot be distinguished.

I even remember that there were two picture: first before warming the oven, the second for the hot oven.

Unfortunately, I spent one hour looking for this picture or a similar one with google, and I could not find it!

Could some of you indicate me where I could find such a nice picture, even in some book (hopefully on google preview or amazon preview).

Thanks,

Michel


Bonus question
I would also be interrested to find the simplest proof that thermodynamic equilibrium leads to the fact illustrated by the picture: no object could be distinguished in an oven at thermodynamic equilibrium.

 

[ctech4285]

http://images.google.com/imgres?img...page=1&ndsp=21&ved=1t:429,r:0,s:0&tx=57&ty=72