41. The intensity of the thermal radiation of the object is directly connected with the object temperature. 42. Incandescence is a special case of thermal radiation . 43. Unlike heat transmitted by thermal conduction or thermal convection, thermal radiation can propagate through a vacuum. 44. Sunlight is part of thermal radiation generated by the hot visible ) because it is cooler. 45. The principle was used by Gustav Kirchhoff in his derivation of his law of thermal radiation . 46. Thermal radiation is a direct result of the random movements of atoms and molecules in matter.47. This " glazing " transmits incoming visible sunlight but is opaque to escaping infrared thermal radiation . 48. Stars then glow because of Thermal radiation . 49. Substances with low specific heat absorb less of the long wave thermal radiation than some other substances. 50. The faint thermal radiation should make some black holes theoretically detectable, though observations so far draw a blank.
