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Diffstat (limited to 'spectr.tex')
| -rw-r--r-- | spectr.tex | 10 |
1 files changed, 8 insertions, 2 deletions
@@ -300,8 +300,12 @@ where $m$ is the diffraction order, and $d$ is the distance between the lines in Also, turn on the sodium lamp as soon as you arrive, since it requires 10-15 minutes to warm up and show clear Na spectrum. -\subsection*{Experimental studies of Hydrogen Balmer line} +\subsection*{Experimental studies of Hydrogen Balmer series} +\begin{figure}[h] + \includegraphics[width=\linewidth]{./pdf_figs/Emission_spectrum-H} + \caption{\label{fig:hydrogen_visible_spectrum} Hydrogen visible spectrum} +\end{figure} Swing the rotating telescope slowly and determine which spectral lines from Balmer series you observe. You should be able to see three bright lines - Blue, Green and Red - in the first (m=1) and second (m=2) diffraction orders on both left \& right sides. In the third order (m=3) only the Blue, @@ -309,7 +313,9 @@ second (m=2) diffraction orders on both left \& right sides. In the third order One more line of the Balmer series is in the visible range - Violet, but its intensity is much lower than for the other three line. However, you will be able to find it in the first order if you look -carefully with the collimator slit open a little wider. +carefully with the collimator slit open a little wider. You should see +spectrum resembling one shown in Fig.~\ref{fig:hydrogen_visible_spectrum}. + % %\emph{Lines to be measured:} %\begin{itemize} |