Rainbows, a spectacle of vibrant colours painted across the sky, are often seen as semicircles due to the horizon obstructing ...

But if you are standing on a mountain where you can see both above and below you, and the sun is behind you and it is misty ...

Rainbows are large luminous arcs that typically feature all the colors of the visible light spectrum. They are formed by ...

Rainbows may be a trick of the eye, but they’re also based in fascinating optical physics. Here's how they work and why we see them.