This image is a derivative work of the following images: File:HydrogenLineParallel.svg licensed with Cc-by-sa-3.0-migrated, GFDL 2011-02-03T23:21:23Z...
This image is a derivative work of the following images: File:HydrogenLineAntiParallel.svg licensed with Cc-by-sa-3.0-migrated, GFDL 2011-02-03T23:11:29Z...
