Blacklight candy

Among the Halloween candies this year are Sour Patch Kids Glow Ups Ghosts "with edible confetti that glows under blacklight". I only found them in large bags rather than the individually-packaged trick-or-treat size, which is just as well, since they might disappoint kids who don't have blacklights handy. Beloved by nightclubs and fans of cosmic bowling, blacklights emit ultraviolet (UV) light. Although UV light isn't visible, when its high-energy photons hit things, some of those things absorb some of that energy and send back lower-energy photons. These lower-energy photons are visible, and we see them as fluorescent light.I happen to have some UV flashlights, so I found some of the Glow Ups and tested them out. Sure enough, the sprinkles glow! The background white and orange candies (artificially flavored peach and orange) also glow, though not as strongly.Sour Patch Kids Ghost Glow Ups, illuminated by a (probably) 395 nm UV flashlight (left) and a 365 nm UV flashlight (right). The…