Where Did the Towers Go? by Dr Judy Wood.
Chapter 13.
Weird Fires
Fires Without Heat, Heat Without Fires
The Rumor of High Heat
The image in Figure 272a [your image] has often been used by those challenging the official story of 9/11, claiming that it proves there was “high heat” in the rubble pile from the WTC.
Hot things glow, but not everything that glows is hot. Consider a fluorescent light. It glows enough to light the room but does not put out light by means of heat (as in incandescence). So, having a photo of something glowing does not prove it was hot. We need to consider more information in regard to the photo. When materials are heated to a particular temperature, they glow a particular color, as shown on the chart in Figure 272b [page 263]. This applies to all metals, molten or not, indoors or out. The material on the right side (in the jaws of the grappler) of Figure 272a [your image] has a color that would imply that most of it is between 810 °C and 1050 °C. But we have to recognize that hydlaulic systems are permanently damaged if operated at temperature above 82 °C. This seeming impossibility or contradiction is addressed more fully in the next section.”
The material on the left side of Figure 272a [your image] has a colour that would imply that most of it is between 1050 °C and 1200 °C. But we also see a lot of unburned paper right next to the glowing material. It even appears that some of the paper might be glowing.” (Page 262).
Luminescence without heating is a phenomenon that is seen in cold fusion as well as in the Hutchison Effect. (Page 264).
The molten metal story appears on the evidence to be just that – a story. Certainly it is a very different thing from the abundant recorded and observable evidence of glowing metal. (Page 267).