When it comes to the vexing problem of red or any other gradient, when we both agree that a thing is some color, is it really ...

The electromagnetic spectrum is a rainbow of light waves that surround us — but we only see a small part of it. From radio waves to gamma rays, each type of light has its own properties and uses. By ...

There’s no brown in the rainbow. The color map reveals that brown is actually dark yellow. (This can be confirmed by projecting a spot of yellow light on a screen in a dark room. If you turn ...

Normally, when you look at a rainbow, the Earth’s horizon in front of ... it bends into the water and separates out into a ...

The atmospheric phenomenon, technically known as a circumhorizontal arc, only occurs at precise locations under specific conditions.