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Neodymium Doped Glass
It changes colors depending on the wavelength of the light hitting it (absorbs some wavelengths and re-emits others).
It changes colors depending on the wavelength of the light hitting it (absorbs some wavelengths and re-emits others).
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An R/C car being driven by a professional R/C racer. (with audio)
Full video: https://youtu.be/ei5XQRW8aaE
Full video: https://youtu.be/ei5XQRW8aaE