More on Refraction

If you were traveling near North Bend, WA on June 14, 2015 at around noon and had looked up toward the sun, you would have seen a 360 degree rainbow much like the one pictured above.

Rainbows are the result of sunlight reflected and refracted by water drops in the atmosphere.  Water drops act like small prisms, leading to a breaking apart of the components of sunlight; this separation is then visible to us as a spectrum of different colors.