TEMPERATURE AND STRUCTURE OF THE SUN. 87 
How near we came to the truth you may learn from the 
fact that a recent theory of Aschkinass led to the value 
KnaxT = 2666. 
Aschkinass starts out from the spectral equation of the 
black body and with the aid of Kirchhoif’s law replaces the 
absorptive power A by R , the power of reflection. Since 
metals transmit no radiation we get: 
E = AS = (1 -R) S. 
Thus, when we measure R in terms of S = 100, the 
radiation of any body is 
E _ 100- R x - 5 1 
1 or long waves and metals of high conductivity, Hagen and 
Rubens established the relation 
100 — R = yj iv , 
where iv denotes the specific resistance of the metal measured in 
ohms and A the wave length of the radiation from the metal. 
Therefore, if we suppose the radiation made up of long waves, 
for which alone this equation holds, we have 
E = Cx 0.365 V w\ 
— 5*5 
C 
\T 
1 
and considering only such low temperatures that Emax is also 
within the scope of the Hagen and Rubens equation, we finally 
g 
get from the condition ~ = 0 
OA 
C 
= 5.477 
'X-max T 
or, when we use c = 14600, as found for a black body, 
KmxT= = 2666. 
5.477 
