New Material For Fast-Change Sunglasses, Data Storage

sciencehabit writes “‘Researchers have developed a material that almost instantaneously (30 ms) changes from clear to dark blue when exposed to ultraviolet light, and it just as quickly reverts to clear when the light is turned off. The new material, one of a class called photochromics, could be useful in optical data storage as well as in super-fancy sunglasses.'” A comment to the article notes some of the potential dangers of quick-change sunglasses.

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