← Back

rainbow

Cambarunio iris

Classification

Family
Unionidae

A rainbow is an optical phenomenon caused by refraction, internal reflection and dispersion of light in water droplets resulting in a continuous spectrum of light appearing in the sky. The rainbow takes the form of a multicoloured circular arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun.

Distribution

(c) Sam Turner, some rights reserved (CC BY) · CC-BY
Loading map…
Countries in the Picchu catalog
United States of America · 244Canada · 132