nostr:npub1ypfcrd4k5ryzlcg8jmdvgrlk29ladfe27z7c2aaq8lvmks6drwqqautsp5 both reflect and absorb based on their color and makeup. This is literally 7th grade science. You can rotate a fan by simply coloring it black/white on different parts of the blades.
Discussion
nostr:npub182f2nv0ckh6cst58s7gu6h4ys55f3yusgenttw9v55xchelyy04sq55z5g nostr:npub1ypfcrd4k5ryzlcg8jmdvgrlk29ladfe27z7c2aaq8lvmks6drwqqautsp5 I mean, black absorbs nearly all energy in the visible spectrum, the energy is converted to heat (which does radiate), but its not reflecting light (not much, anyway).
I think that's the point nostr:npub1gxv4vcqfp2ug07fd34t0swq4w2t9gsynu0cmelr6ktcna8xnv38qythh99 was making.
I can't think of a single substance which reflects 100% energy and absorbs 100% energy in the same wavelengths.
There's tradeoffs.