That internal reflection produces the arc of sunlight spread out across its spectrum of colors -- a rainbow. Pigott said a double rainbow is formed when there are two reflections inside a raindrop.

A double rainbow was visible when there was a second reflection within a raindrop, so the colours were reflected twice. "The second rainbow actually flips the order of the colours, and it's a lot ...

It’s that reflection that we see in the sky as a rainbow. Double rainbows happen when the light gets reflected twice inside the water droplet. It’s a reflection of the reflection. So ...

Supernumerary bows are sometimes seen inside the primary rainbow. Reflection rainbows are caused by light reflecting off a still body of water, appearing opposite the sun in the sky. The AMS says ...

So what of the third bow? This is known as a reflection bow. Whilst rare, a reflection rainbow mainly occurs when the sun is lower on the horizon behind you (i.e. late afternoon/evening), and when ...