Electric-radiative circuits like thermal radiators are divided into two broad classes, good radiators and bad radiators.
But we know also that in the complete radiation of a white body the radiative energy increases with the fourth power of the absolute temperature.
For More Complex Molecules The Radiative And Absorptive Powers Are Known To Be Much Greater.
These yielded a remarkable extension of Pierre Provost's "Law of Exchanges," and enabled him to establish the fact that radiation is not a surface phenomenon, but takes place throughout the interior of the radiating body, and that the radiative and absorptive powers of a substance must be equal, not only for the radiation as a whole, but also for every constituent of it.
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