Article View: sci.physics
Article #1081Re: Xeroxing mirrors
From: Jon J Thaler
Date: Sat, 11 Apr 1992 21:21
Date: Sat, 11 Apr 1992 21:21
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In article <8400009@trsvax>, pauls@trsvax.tandy.com says: > Can somebody explain this to me?? > I tried to Xerox a flat mirror. The paper came out pitch black. > Well?? I would suppose that a photocopier uses the diffuse reflection from the document to be copied. Paper does not have much specular reflection (and that which it does have is not from the ink - try reading a glossy magazine when the reflected light shines in your eyes). Your mirror, having *ONLY* specular reflection, is as invisible to the copier as the glass plate you put the paper on.
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Path: arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!uwm.edu!linac!unixhub!slacvm!doctorj From: DOCTORJ@SLACVM.SLAC.STANFORD.EDU (Jon J Thaler) Newsgroups: sci.physics Subject: Re: Xeroxing mirrors Message-ID: <92102.132103DOCTORJ@SLACVM.SLAC.STANFORD.EDU> Date: 11 Apr 92 21:21:03 GMT References: <8400009@trsvax> Organization: Stanford Linear Accelerator Center Lines: 13