The recent photo of a "quadruple rainbow" was a reflection rainbow. Two of the rainbows are the primary and secondary rainbows formed directly from the sun and are centered at the antisolar point. read more
The recent photo of a "quadruple rainbow" was a reflection rainbow. Two of the rainbows are the primary and secondary rainbows formed directly from the sun and are centered at the antisolar point. When the sun is above the horizon (the usual case when viewing a rainbow), the antisolar point lies below the horizon. read more