Photochromatic sunglasses

Photochromatic sunglasses

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This image is part of the sequence technology: photochromatic sunglasses


Caption: Photochromatic sunglasses in overcast conditions. Photochromatic lenses darken on exposure to ultraviolet (UV) light. The greater the amount of UV light in an environment the darker the lenses become.

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Keywords: beach, beach towel, chemistry, glasses, lens, lenses, light sensitive, low light, overcast, photochangeable, photochemical, photochromic, photoreactive, physical, physics, reaction, reversible photochemical reaction, sand, sandy, spectacles, sunglasses, sunlight, technological, technology, tint, tinted, transition, transitions

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