Im dong the zeeman effect for Mercury trasitions 3S1 --> 3P0/1/2 (Violet, Blue and Green lines). I've taken CCD pictures of all lines in a weak B field and with polaroid placed parallel and perpendicularly, and produced graphs of pixel value v column number (intensity v horizontal position). I cannot work out how to interpret the intensities. I've got the relative ratios from my data but they don't seem to be correct (well i don't know). And i cant explain why the Blue pattern is missing it's central peak, ie there should be 7 transitions for 3S1 -->3P1 but graph only shows 6 http://www.breadnet.middlebury.edu/~PHManual/Photos/zeeman/fig4.gif [Broken] (From breadnet.middlebury.edu) a) is Blue pattern b) Green Can somebody point me on the right path?