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Incredible new study at Washington State University found Egyptian Blue emits near‑infrared light 🤯 This is a fragment of ancient Egyptian Blue paint. When researchers hit it with visible light (green, around 530–550 nm), the pigment absorbed it and re‑emitted near‑infrared light at 910–940 nm. Our eyes can’t see... show more
181,635 次观看 • 6 个月前 •via X (Twitter)
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