Double rainbow

Double rainbow
Date:22 February 2010

When direct sunlight strikes falling rain, a rainbow is seen at a point directly opposite the Sun.

A double rainbow occurs when some of the light entering the raindrop is refracted into its component colours, reflected off the back interior wall of the drop, and then refracted again as it exits the drop. The dark area in between the two rainbows is called Alexander's band.

Latest Issue :

March 2021