Keywords: rainbow uruguay outdoor A double rainbow appeared briefly today on the south side of the embassy. According to Wikipedia, secondary rainbows are caused by a double reflection of sunlight inside the raindrops. The dark area of unlit sky lying between the primary and secondary bows is called Alexander's band. [U.S. Embassy photo by Vince Alongi / Copyright info] A double rainbow appeared briefly today on the south side of the embassy. According to Wikipedia, secondary rainbows are caused by a double reflection of sunlight inside the raindrops. The dark area of unlit sky lying between the primary and secondary bows is called Alexander's band. [U.S. Embassy photo by Vince Alongi / Copyright info] |