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Does Glass block harmful rays of sunshine ?

does Glass really block harmful rays of sunshine, those that cause skin cancer?  I am asking about regular glass, like, if I seat at home next to a window and full sunlight comes through. NOT about car windows, that are sometime "tinted" or have "sunblockers" injected into them when manufactured. IF you can provide linkds to one or two "official" articles to prove your answer, kindly do.  IF you do not know the answer to this question, please do not reply. Thank you!

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The harmful sun light is the ultra violet, a radiation with wavelength shorter that 400 nanometres (nm). Ordinary glass block 90% of the radiation with shorter-than-300nm wavelength, but allows for more than 90% of the longer-than-350nm-wavelength radiation to pass through.

Since the harmful radiation is especially that with wavelength of under 315nm, ordinary glass does give some protection, although not a complete one. It is clear, however, that sitting at home behind a glass window exposes you to much less risk of suffering the negative effects of ultra-violet radiation. 


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