Scientists have developed a new type of ultra-violet (UV) sensing technology that could be used in a mass-produced wearable device. The breakthrough uses a switchable dye that changes color in response to UV light, allowing users to easily monitor their UV exposure and take steps to protect themselves from the sun’s harmful rays. The technology could be used in a variety of products such as sunglasses, hats, and wristbands, and could help people of all ages stay safe in the sun.

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source: Phys.org