TIL about ulexite, “tv rock” natural mineral that acts like optic fiber
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You can buy some on amazon for $10 amazon.com/Copernicus-CCT
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Here’s a nice kit of fiber optics experiments arborsci.com/products/adven
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Here’s the experiments manual. Reading it was illuminating. asc-mag-media.s3.amazonaws.com/datasheet/Adve

