Photochromatic lens, What is photochromatic lens in Hindi

A photochromic lens is an optical lens that darkens on exposure to light of sufficiently high frequency, most commonly ultraviolet (UV) radiation. In the absence of activating light, the lenses return to their clear state. Photochromic lenses may be made of polycarbonate, or another plastic. Glass lenses use visible light to darken. They are principally used in glasses that are dark in bright sunlight, but clear, or more rarely, lightly tinted in low ambient light conditions. They darken significantly within about a minute of exposure to bright light and take somewhat longer to clear. A range of clear and dark transmittances is available.
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Check out my Short video demo on Photochromatic lens colour change
ruclips.net/user/shortsSQM9bKtiiog?feature=share

[@shivanisharma3530]

So informative video 📹 👏

[@anujkumaryadav9813]

Nice Knowledgeable topic

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Thanks Anuj 💞

[@abdulrehmanenglishhistory7489]

Good 👍 video

[@abdulrehmanenglishhistory7489]

i am from pakistan 🇵🇰

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Thanks