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@@ -118,7 +118,7 @@ Once the interferometer is aligned, insert a convex lens ($f=\unit[18]{mm}$ work
\begin{figure}[h]
\centering
\includegraphics[width=0.7\columnwidth]{./pdf_figs/fig3}
-\caption{\label{fig3mich.fig}Micrometer readings. The course 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. }
+\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}
\section*{Wavelength measurements using Michelson interferometer}