Page:Zur Theorie der Strahlung bewegter Koerper.djvu/8

 It is

from which the relations

$\cos\phi=\frac{1-\sigma\ \cos\varphi}{\sqrt{1+\sigma^{2}-2\sigma\ \cos\ \varphi}}$|undefined

and

are given.



Thus it is

if we insert this into equation $$i=i_{0}+p_{1}c$$, then it follows

and

Quite similar it is given: