Here I have a ceramic pot on the stove. This pot is a terrible conductor of heat, so the heat just goes around the outside of the pot. The second picture was taken just to the right of the first, and you can see an artifact on the left side of the picture (the rainbow-like thing) because the pot on the left is so bright/hot. (Might be diffraction pattern caused by the chopper.) In the third picture I have turned off the stove, but both the stove and the pot are still hot.