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Author Comment Last activity Moderation
doctek "That helps a ton! Not only do I see the spectra, I can even photograph them. Here are some shots of what I built, and a spectrum from the cloudy sk..." | Read more » about 5 years ago
doctek "Not sure if that helps or not. Here is a fundamental question I'm unclear about. Knowing that the diffraction lines on the DVD are parallel to the ..." | Read more » about 5 years ago
doctek "Thanks for this clever design! I made this using my Portrait and the only cardstock I had handy: pink. After assembly, I covered the outside in bla..." | Read more » about 5 years ago