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gtrubetskoy
on May 15, 2019
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LED light can damage eyes, French health authority...
Any compact disk works as a spectrometer.
https://www.cs.cmu.edu/~zhuxj/astro/html/spectrometer.html
NIL8
on May 16, 2019
[–]
I've never seen this. Thanks!
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Search:
https://www.cs.cmu.edu/~zhuxj/astro/html/spectrometer.html