the Inca site of Machu Picchu, Peru imaged
in Jan '08 by Colin Summerell. Image ©Colin Summerell, shown with permission.
The Incas regarded the rainbow as a gift from
the sun god and their multi-coloured flag represents Tawantinsuyo
Here the sun was higher than 42° and the inner primary and
reversed colour secondary bows
appear in the precipice and below
They are slightly wider and more pastel than usual indicating
that they were formed by the smaller
water drops of light drizzle
rather than the larger ones of a heavy rain shower.