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@@ -117,7 +117,16 @@ Once the interferometer is aligned, insert a convex lens ($f=\unit[18]{mm}$ work
\textbf{Note}: before starting the measurements, make sure you understand how to read the micrometer properly!
\begin{figure}[h]
\centering
-\includegraphics[width=0.7\columnwidth]{./pdf_figs/fig3}
+%\includegraphics[width=0.7\columnwidth]{./pdf_figs/fig3}
+\subcaptionbox{Reading = 211~$\mu$m} {
+\includegraphics[height=1.3in]{./pdf_figs/micrometer1}
+}
+\subcaptionbox{Reading = 345~$\mu$m} {
+\includegraphics[height=1.3in]{./pdf_figs/micrometer2}
+}
+\subcaptionbox{Reading = 166~$\mu$m} {
+\includegraphics[height=1.3in]{./pdf_figs/micrometer3}
+}
\caption{\label{fig3mich.fig}Micrometer readings. The coarse division equals to 100~$\mu$m, and smallest division on the rotary dial is 1~$\mu$m (same as 1 micron). The final measurements is the sum of two. }
\end{figure}