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Fun with Diffraction Gratings!! Preprinted Rainbow Peepholes™. Always in stock and ready to ship. The ideal teacher incentive. Great in the classroom when a quality diffraction grating is needed for the study of Light and Color. Just look t...
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AMAZING for EDM music festivals and raves!
Many years ago at an EDM concert, someone gave one of these to my wife and me. Since then, we have bought thousands of them and given them away ourselves. Everyone loves them. It goes the same way every time. We hand it to a stranger, they look at it and go, "Huh? Wha?" Then we show them - look at the lasers through the disc (we call them laser discs). The person looks through the laser disc at the lasers and the stage, and they go "WHOA!" and they thank us a million times, and then they show it to their partner or friend, and we give one to that person too. Same reaction. We love it!
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Andrew · May 13, 2026
Science meets Art
Rainbow Symphony's diffraction grating rainbow peepholes are used in our science workshop exploring light. Compact and effective, students explore dispersion of light with their peepholes.