Scientists record heat moving at speed of sound
Scientists have recorded first-ever videos of heat moving through materials at the speed of sound. Traveling at nano-scale, the waves of energy have been recorded moving at about 6 nanometres (0.000000006 meters) per picosecond (0.000000000001 second). The videos were made using an ultrafast electron microscope called FEI Tecnai Femto, and were slowed by over a billion times the normal speed.