31. The stored heat is given off continuously ( through thermal radiation and convection ). 32. In response to thermal radiation , surface temperature depends on the thermal emissivity of the material. 33. Non-thermal radiation has been found which is believed to be from an old supernova remnant. 34. The second equality holds if we are considering uniform thermal radiation at a temperature T. 35. By Kirchhoff's law of thermal radiation a substance that absorbs thermal radiation also emits it. 36. :Your second question might be answered by Thermal radiation . 37. The thermal radiation spontaneously emitted by many ordinary objects can be approximated as black-body radiation. 38. Energy losses occur through heat conduction from workpiece to fixture, natural convection, and thermal radiation . 39. By Kirchhoff's law of thermal radiation a substance that absorbs thermal radiation also emits it. 40. The ability to sense infrared thermal radiation evolved independently in several different families of snakes.