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RE: filmscanners: Re: looking at the Sun



> From a prctical point of view, I seriously doubt that glass absorbs a heck
> of lot of UV, certainly not over a long term.
>

Correct.  Most glass readily transmits near UV quite well.  For example, a
very common optical glass, BK7 transmits 80% of light at 340 nm and 5% at
300 nm.  This is typical for many glasses.  It is mainly the heavy flints
and rare earth glasses that tend to absorb the near UV.




 




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