Datei:Light blue ribbon.svgDescriptionLight blue ribbon.svg English: light blue ribbon Date 16 February 2007 Source own work created in Inkscape, based on the graphics by Niki K
Datei:Jade ribbon.pngThis image is a derivative work of the following images: Image:Light_blue_ribbon.svg licensed with Cc-by-sa-2.5,2.0,1.0, GFDL 2007-02-16T15:36:37Z MesserWoland
Datei:Fresneldiffraction-2.svgon the (blue) screen; Q, position of the first order internal dark fringe; P, position of the first order external dark fringe. A'B', ribbon, used by