<img src="http://foxridge.mpiwg-berlin.mpg.de/permanent/einstein/annalen/Einst_Zurth_de_1906_01/fulltext/img/Einst_Zurth_de_1906_0118x.png" alt="Ea+ integral d Ea dxad qa = konst.dEa E a " class="par-math-display"/>
<img src="http://foxridge.mpiwg-berlin.mpg.de/permanent/einstein/annalen/Einst_Zurth_de_1906_01/fulltext/img/Einst_Zurth_de_1906_0119x.png" alt="S = R- lg W, N " class="math-display"/>
</center>
</td>
<td width="5%">(5)</td>
</tr>
</table>
<p class="nopar"/>
<p class="noindent"/>
<table width="100%" class="equation">
<tr>
<td>
<a id="x1-7r6"/>
<center class="math-display">
<img src="http://foxridge.mpiwg-berlin.mpg.de/permanent/einstein/annalen/Einst_Zurth_de_1906_01/fulltext/img/Einst_Zurth_de_1906_0120x.png" alt=" H+D integral H W = dE ...dE 1 n H " class="math-display"/>
</center>
</td>
<td width="5%">(5a)</td>
</tr>
</table>
<p class="nopar"/>
<p class="noindent">gesetzt </p>
<p class="indent"> Würde man
<span class="cmmi-10">S </span>
nach dieser Formel berechnen, so würde
<br/>
man wieder zu der ungültigen Strahlungsformel (1) gelangen.
<br/>
Zur Planckschen Formel aber gelangt man, indem man
<img src="http://foxridge.mpiwg-berlin.mpg.de/permanent/einstein/annalen/Einst_Zurth_de_1906_01/fulltext/img/Einst_Zurth_de_1906_0121x.png" alt=" R- e = N bn. " class="par-math-display"/>