Rainbows can be full circles, however, the average observer sees only an arc, formed by illuminated droplets above the ground.
In a double rainbow, a second arc is seen outside the primary arc, and has the order of its colours reversed, red facing toward the other one, in both rainbows. This second rainbow is caused by light reflecting twice inside water droplets.
Hereunder are some analogue photos of bright rainbows.
|Rainbow over Moneglia by Bernd H|
|Rainbow over ulting church by pastelbear|
|pensive rainbow by Sonnie Larinne|
|Rainbow Bridge by Carmbler®|
|Rainbow by joart|
|When the sky was washed with colour... by Ben Innocent|
|Rainbowx2 by santisss|
|217028 rainbow by Erven2010|
|Rainbow Kiss by lucia sucha|
|Rainbow by Chris Protopapas|
|Double Rainbow by mugitee|
|1997-10-PCD4025-024 by Troy Hacker|