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\begin{document}

\begin{figure}[!ht]
\centering
\subfigure[20 درجه]{\includegraphics[scale=0.5]{2031t}	\label{fig:201t}}
\subfigure[25 درجه]{\includegraphics[scale=0.5]{251t}	\label{fig:251t}}
\subfigure[30 درجه]{\includegraphics[scale=0.5]{301t}\label{fig:301t}}
\subfigure[35 درجه]{\includegraphics[scale=0.5]{351t}\label{fig:351t}}
\subfigure[40 درجه]{\includegraphics[scale=0.5]{401t}	\label{fig:401t}}
\subfigure[45 درجه]{\includegraphics[scale=0.5]{451t}	\label{fig:451t}}
\subfigure[50 درجه]{\includegraphics[scale=0.5]{501t}	\label{fig:501t}}
\subfigure[55 درجه]{\includegraphics[scale=0.5]{551t}\label{fig:551t}}
\subfigure[60 درجه]{\includegraphics[scale=0.5]{601t}\label{fig:601t}}
\subfigure[65 درجه]{\includegraphics[scale=0.5]{551t}\label{fig:651t}}
\subfigure[70 درجه]{\includegraphics[scale=0.5]{701t}\label{fig:701t}}
\caption{ نمودار توزیع شدت برای پله ای‌ با ارتفاع \lr{nm} 100، $ n_l=1/38 $ و $ n_r=1/52 $}
\label{fig:theory2}
\end{figure}





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