Talk:Fraunhofer lines

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It would be useful to discuss the meaning of the X and Y axis in the graphic. I assume the Y axis represents frequency (due to the use of colors), but it is unclear what the X axis represents.

I believe that the X axis represents the elements (from Hydrogen to ?). MichaelGoldshteyn 17:43, 3 October 2006 (UTC)

What are you talking about? Its all frequency. its just a looped continuous spectrum. --Deglr6328 10:55, 19 October 2006 (UTC)

[edit] G band

In some sources it can be found, that G band correponds to CH ([1] or [2]), not only to Fe and Ca. Orionus 15:56, 25 July 2007 (UTC)

[edit] O₂ is a compound

In the table, O₂ is listed even though the element is O. Is there a reason for this? --196.210.102.113 (talk) 20:45, 16 January 2008 (UTC)

The A, B and a lines are so-called "telluric" lines which arise from absorption (in this case by molecular oxygen, O₂) in the Earth's atmosphere [3]. Spacepotato (talk) 23:09, 16 January 2008 (UTC)