Date: Tue, 24 Feb 2004 23:37:13 GMT From: Bob <uctraingNOSPAMnospamanet.com> Subject: Re: Preventing/repairing dash cracks
On Tue, 24 Feb 2004 17:37:35 +0000, Grunff <grunffnospam.com> wrote: >It's actually very much the other way round. Deep blue light is ~400nm. >Beyond that you're into near UV. Near UV does pass through glass with >reasonably low absorption. The cutoff point for ordinary silica glass is >around 350-320nm. Anything shorter than that is completely absorbed. > >These shorter wavelengths contain a lot more energy than the longer >wavelengths, and are therefore a lot more damaging to both skin and >plastic. They are the ones that matter. I'd have to dig out my notes to see if I concur with that. :-)
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