It turns out Jolly Rancher candies light up strongly under UV illumination. I advance some theories as to why.
Jolly Rancher fluorescence
Oct 16, 2026
Tag: blacklight
Total 2 Posts
Three views of the same flasks of fluorescent rhodamine dye. At the far right
is a picture of how the flasks look under regular room lights. In the middle,
the scene is illuminated by a UV-emitting flashlight (otherwise known as a
blacklight). Under this strong, high-energy illumination, the
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