Why do windows block UVB, but not UVA rays?

Question

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

Answer 1

UVB is the shorter and more energetic of the two types of UV radiation.
Since the wavelengths of UVB are smaller, they are more likely to be
absorbed by glass. UVA is the longer and less energetic of the two types
of UV radiation, so it is more likely to pass through glass without
being absorbed.