I read that windows block majority of sun radiation, some even claimed that windows block almost 100% of UVB, but I found no reliable sources on windows blocking UVA. I guess it is due to the wavelength and UVA having longer wavelength means they penetrate deeper, but why is that so ?
Edit: I formulated my question poorly, instead I should’ve asked: what prevents us from creating windows that block UVA rays?
In: 2
We make windows out of material that allows visible light to pass through, that is the whole point of a window, and UVA is the type of UV very close to visible light and so it makes it through. [Here is a diagram for refference](https://materion.com/-/media/images/business-units/advanced-materials-group/me/newsletter-images-2016_targeted-emails/uv-in-electromagnetic-spectrum_600.jpg).
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