diff --git a/script/chapter3.tex b/script/chapter3.tex
index 99eb7fd..6fbf437 100644
--- a/script/chapter3.tex
+++ b/script/chapter3.tex
@@ -99,7 +99,7 @@ \section{Feynman-Stückelberg Interpretation of negative energy states}
 \begin{figure}[ht]
    \centering
    \includegraphics[width=0.8\linewidth]{fs-interpretation/fs-interpretation.eps}
-   \caption{scattering process; horizontal time-axis; in the second diagram a electron positron pair is produced}%
+   \caption{scattering process; vertical time-axis; in the second diagram a electron positron pair is produced}%
    \label{fig:}
 \end{figure}