Every night from dusk until dawn, a rainbow of colors transforms ... A mirror placed at the top of the tube causes the colors to bounce off the reflectors. Milky windows then diffuse the light across ...

If you're lucky enough to see a rainbow from a plane or the top of a mountain it appears as a circle because there is nothing in the way to stop you seeing light reflected from all around.

Watch: This photographer's footage of a double rainbow, as seen from a trail in the Golden Gate National Recreation Area, ...