Low rainbow, Loch Awe Scotland
Loch Awe, Scotland imaged in April '06 by Steve Crowe (more images). The centre of a rainbow is always directly opposite the sun. The higher the sun, the lower is the bow. The sun was about 40° high when Steve saw this bow. When the sun is higher than the primary bow's radius of 42° a bow can only seen below the horizon.  Close to sunrise or sunset the low sun produces a rainbow high in the sky. ©2006 Steve Crowe, shown with permission.