I love rainbows, they're so pretty. It's hard to believe that it is caused by water bending light sometimes.
A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets 
Yep it sure it, I couldn't remember that many details though lol. I really do like how the gay people have taken it to be their symbol too. 
Uhmnn,never knew it was used as a symbol. However the water droplets resulting in a spectrum of light appearing in the sky
Do you know why we never see the bottom of the rainbow? 
Well,I believe it could be as a result of the Atmospheric optics which deals with how the unique optical properties of Earth's atmosphere 
Oh cool. DO you know of any other phenomena that are caused by the refraction of light? 
rainbow is caused by light being refracted when entering a droplet of water, then reflected inside on the back of the droplet and refracted again 
Right, but what about double rainbows?
A double rainbow, a second arc is seen outside the primary arc, and has the order of its colors reversed, with red on the inner side of the arc.