It’s insignificant.
From: Mike Shaw [mailto:jmikes...@ntlworld.com] Sent: Wednesday, August 03, 2011 8:29 AM To: ka...@karonadams.com; 'John Carmichael'; sundial@uni-koeln.de Subject: Re: mock stained glass sundial If you are going to allow your shadow to pass through two panes of glass, will refraction start to become important? Mike Shaw 53º 22'N 03º02'W www.wiz.to/sundials
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