fluorescence

Ben Krasnow of Applied Science demonstrates an X-ray fluorescence gun that measures chemical composition, tears it down, analyzes its failure, and discusses a new XRF technology appearing on eBay.

Veritasium shows what the world looks like through a UV camera. It covers how pigments absorb UV, how fluorescence works, and how UV imaging reveals sunscreen effectiveness and skin damage.

NileRed makes radioactive uranium glass from scratch, showing the chemistry involved and the green fluorescence under a blacklight. The video includes warnings about handling radioactive material.