ملف:Large convex lens.jpgDescriptionLarge convex lens.jpg Convex lens Taken by en:fir0002 Source http://en.wikipedia.org/wiki/Image:Large_convex_lens.jpg Author User Fir0002 on
ملف:Large convex lens2.jpgDescriptionLarge convex lens2.jpg English: Light beams converging through a Convex lens Date 10 April 2006 (original upload date) Source Fir0002 (talk)