“ultraviolet”, not infrared. IR to visible light would be upconversion.
https://en.wikipedia.org/wiki/Photon_upconversion
Oh, interesting. So do all neon colors reflect ultraviolet as visible light? Would a neon color that reflects IR as visible be possible? Or is it already figured out, but more expensive than UV neon paint?
alt Hacker News
Oh, interesting. So do all neon colors reflect ultraviolet as visible light? Would a neon color that reflects IR as visible be possible? Or is it already figured out, but more expensive than UV neon paint?