deletions | additions       diff --git a/When_we_measure_the_transmission__.tex b/When_we_measure_the_transmission__.tex  index a8414b8..45e5216 100644  --- a/When_we_measure_the_transmission__.tex  +++ b/When_we_measure_the_transmission__.tex 
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When we measure the transmission of the probe beam with a photodiode, we get our negative Gaussian absorption curve,\textit{ but we also get a small Lorentzian peak at the rest frequency of the transition} because the probe beam is not being absorbed by the atoms at that frequency, since the pump beam has already excited all of the atoms in the zero velocity class. Since we have hyperfine structure, there are multiple transitions within the Doppler profile.  The Lorentzian peak can actually appear hyperfine structure appears  as multiple small Lorentzians, due to hyperfine structure. Lorentzians.  With the transitions we measure, we expect to see three hyperfine peaks. However, due to crossovers, we actually see six. Crossover peaks appear midway between each of the energy levels in the atom and can be even stronger than the peaks due to hyperfine structure \textbf{(Melissinos 244-245). } \textbf{ARGH! You MUST actually insert a live citation here. It is NOT hard to do, and learning how to do so is an expectation for the course. }You already have been shown several examples of how to do it, and have been given an example using Melissinos as a reference. Why not do it?