On the computation of the constant Csub2 of Planck's equation by an extension of Paschen's method of equal ordinates . •!)! ;•!;! ? IlUlliUl ,..ii • i-(!--;M ihiiSii |i hill i!it/4j!j;!;>:ri HHSflRT. WASHINGTON GOVERNMENT PRINTING OFFICE 1911 ON THE COMPUTATION OF THE CONSTANT C,OF PLANCKS EQUATION BY AN EXTENSION OFPASCHENS METHOD OF EQUAL ORDINATES By Edgar Buckingham and J. H. Dellinger . 1. INTRODUCTION Plancks equation for the intensity of radiation /, of wave length\ from a black body at the absolute temperature 6, namely or _5/ _£2 _2« \ _Ci , V J = c,\ \i+e ^^ + e ^^ + ^9 ^2)
On the computation of the constant Csub2 of Planck's equation by an extension of Paschen's method of equal ordinates . •!)! ;•!;! ? IlUlliUl ,..ii • i-(!--;M ihiiSii |i hill i!it/4j!j;!;>:ri HHSflRT. WASHINGTON GOVERNMENT PRINTING OFFICE 1911 ON THE COMPUTATION OF THE CONSTANT C,OF PLANCKS EQUATION BY AN EXTENSION OFPASCHENS METHOD OF EQUAL ORDINATES By Edgar Buckingham and J. H. Dellinger . 1. INTRODUCTION Plancks equation for the intensity of radiation /, of wave length\ from a black body at the absolute temperature 6, namely or _5/ _£2 _2« \ _Ci , V J = c,\ \i+e ^^ + e ^^ + ^9 ^2) appears to represent the results of all known observations, nearlyor quite within the limits of experimental error. As X6 decreases,the factor in the parenthesis in equation (2) approaches unity,and the equation tends toward the simpler equation of Wien, or j=c^X % ^^ (3) If X is expressed in microns and 0 in centigrade degrees of thestandard gas scale, the value of the constant Cg is in the vicinity of14400, being apparently between 14600 and 14200. If A. = ,which is about the limit of the visible red, the value of the factorin the parenthesis in equation (2) is about i .00007 ^^ the monco73934061911162162buck
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