Wärmestrahlung

Physik

Basisiwssen

Bereits Isaac Newton (1642 bis 1727) vermutete eine strahlungs- oder wellenartige (vibrations) Übertragung von Wärme^[1]: als Wärmestrahlung bezeichnet man in der Physik ausgesandte elektromagnetische Strahlung. Im engeren Sinn meint man damit die für Menschen unsichtbare Infrarotstrahlung, die einen großen (aber nicht den größten) Anteil an der abgestrahlen Energie der Sonne hat. Siehe auch IR-Strahlung ↗

Fußnoten

[1] Isaac Newton sieht Wärmeübertragung strahlungsartig: "If in two large tall cylindrical Vessels of Glass inverted, two little Thermometers be suspended so as not to touch the Vessels, and the Air be drawn out of one of these Vessels, and these Vessels thus prepared be carried out of a cold place into a warm one; the Thermometer in vacuo will grow warm as much, and almost as soon as the Thermometer which is not in vacuo. And when the Vessels are carried back into the cold place, the Thermometer in vacuo will grow cold almost as soon as the other Thermometer. Is not the Heat of the warm Room convey'd through the Vacuum by the Vibrations of a much subtiler Medium than Air, which after the Air was drawn out remained in the Vacuum? And is not this Medium the same with that Medium by which Light is refracted and reflected, and by whose Vibrations Light communicates Heat to Bodies, and is put into Fits of easy Reflexion and easy Transmission? And do not the Vibrations of this Medium in hot Bodies contribute to the intenseness and duration of their Heat? And do not hot Bodies communicate their Heat to contiguous cold ones, by the Vibrations of this Medium propagated from them into the cold ones? And is not this Medium exceedingly more rare and subtile than the Air, and exceedingly more elastick and active? And doth it not readily pervade all Bodies? And is it not (by its elastick force) expanded through all the Heavens?