Page:Über die Energievertheilung im Emissionspectrum eines schwarzen Körpers.pdf/8

At about the same time that I had derived the formula for $\varphi _{\lambda }$ from the theoretical considerations brought forth, arrived the formula found independently by by Prof. Paschen

$\varphi _{\lambda }={\frac {C}{\lambda ^{\alpha }}}e^{-{\frac {c}{\lambda \vartheta }}}$

(Where $\alpha$ a constant), which was best at representing his observations, and he was kind enough to let me know of it, and to permit me to communicate his formula here. The value of the constant $\alpha$ Prof. Paschen intends to determine from the complete calculation and comparison of his observations. If $\alpha$ is not $5$ , the total emission would not follow Stefan's law.

Charlottenburg , June 1896.