Rainbows!

Yesterday, I found this prismy thing by the back door. It's supposed to be hung in a window, and make rainbows.
With help from my parents to hold the flashlight, I got lots of pretty pictures of rainbows. :P The prism is acting as a lens, and refracting the light through dispersion. Since the n value of the glass is different from that of the air, the light will refract and chromatically disperse. Different wavelengths refract differently, so we see a rainbow of colors from the white light of the flashlight.
Pretty colors!