A new relation derived from Planck's law

A new relation derived from Planck's law

Year: 1916

Of the many possible relations which may be derived from the radiation law cf Planck only a few have received any attention. The most important of these are the two displacement laws of Wien, namely lambda /sub max./ thetas const., and J/sub max/ thetas /sup -5/=const. Salpeter has denied a function of A and thetas as follows: eta ( lambda , thetas )=/sub lambda // int /sub 0/J lambda /b d//sub lambda /, where J/sub lambda / is the intensity of radiation of absolute temperature thetas , and wave-length lambda as determined by Planck's law. The functions part eta / part lambda = 0 and part eta / part thetas = 0 have root, giving lambda /sub m/ thetas = const. identical with Wien's displacement law. Any number of displacem