this makes me think... newton must have noticed rainbow artifacts from imperfect (optically/geometrically) glass objects of the 17th century and decided to investigate... modern glass is high quality, geometrically near perfect etc.
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I'm house/pet sitting for neighbor + they have perfume bottle(?) in the window with prism base that casts rainbows throughout the kitchen/living room in the morning (rn it's on the couch).
Purple is gorgeous, photo unfortunately shows "enhanced" colors, not sure how to override.
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