Rainbow in Waterfall

The same kind of light paths that create a rainbow in the sky can produce a rainbow in the spray of a waterfall. If you are looking at the rainbow in the waterfall, the sun must be behind you. The rainbow shown is a primary rainbow and is formed as a circular arc around the anti-solar point and at an anglar range of about 40° to 42°. This rainbow is in the Athabasca Falls of Alberta, Canada.