Flexi Says: Formed by refraction, rainbows can be seen anywhere light passes through a medium of spherical water droplets. The rainbow results from a series of steps. Light is initially refracted as it enters a raindrop, then reflected off the back of the raindrop, and then once again refracted as it leaves the drop of water. As a beam of light is refracted, different wavelengths in the light bend at different angles. Shorter wavelengths (violet) are refracted at a greater angle than longer wavelengths (red). This essentially splits the white light into the colors you see in a rainbow.
