Date: Sun, 29 Feb 2004 07:52:07 GMT From: "James Sweet" <jamessweetnospamail.com> Subject: Re: Re: Preventing/repairing dash cracks
"Malcolm William Mason" <mwm1(delete)nospamedu> wrote in message news:pl33405elt09hso2c9fcoimvo8gp27a8h7nospamcom... > On Tue, 24 Feb 2004 23:37:13 GMT, Bob <uctraingNOSPAMnospamanet.com> > wrote: > > >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. > > > Then how does one account for feeling warm next to a window on a sunny > day? > > And why oes one never get a tan indoors? > > I understand that the UV is almost entirely absorbed and the IR goes > blythley through in both directions and can be a consideable > heatlosswith unshshaded windows inon dull winter days and at night. > > Malcolm That's pretty much exactly what the guy who you replied to said.
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