Read how the catastrophic propagation of fractures can be explained by their extreme temperature. Or how to generate a small ‘sun’ with some adhesive tape.
“The fractoluminescence phenomenon, that is, the emission of visible light when a material breaks, is generally unknown from the general public. It is yet rather easy to observe it, as one may only need to quickly unroll some adhesive tape in the dark (as shown in the picture). This intriguing phenomenon can be explained by