Dear 100 Hour Board,
I know that rainbows have been associated with gays for a few years now. Does that mean that as a straight person I can't be fascinated by them? No wait, my real question is what causes a double rainbow. My confusion comes from the invisible area. What causes the light to shift back into the visible colors?
Double rainbows, like single rainbows, are caused by the refraction of light through water particles. When the particles are a certain size, the light can bounce around inside the water and refract out at a slightly different angle. Find out more about rainbows at http://science.howstuffworks.com/rainbow.htm
-KL loves rainbows