Ryan Hunter (redditor yanray) is the co-author of the coloring book Coloring for Grownups. He also came up with these crayon colors for a contest. These are the colors you don't forget. -via reddit
View more fun pics over at our NeatoPicto Blog
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http://en.wikipedia.org/wiki/Diffraction_grating
We have made a Spectro-Kit for cellular ( http://www.instructables.com/id/digital-camera-spectroscope_1/ ).
diffraction grating came from RainbowSymphony.
Please Make it ! Use It ! and send us your picture : ovnitech@free.fr
For more information about us : ovnitech.free.fr
www.lamaredunet.fr