Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!sgi!donl@glass.SGI.COM
From: donl@glass.SGI.COM (donl mathis)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Photographing PC Screens
Message-ID: <29050@sgi.SGI.COM>
Date: 20 Mar 89 23:02:23 GMT
References: <3779@peora.ccur.com> <3939@kuhub.cc.ukans.edu> <7454@pyr.gatech.EDU> <17769@onfcanim.UUCP>
Sender: daemon@sgi.SGI.COM
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Organization: Silicon Graphics, Inc., Mountain View, CA
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In article <17769@onfcanim.UUCP>, dave@onfcanim.UUCP (Dave Martindale) writes:
> The intensity of light from a particular point on the screen does fall
> off with the inverse-square law, but the area of the screen being

Pardon my sarcasm, here, but you folks seem a little bit confused about
something!

Perhaps there is a difference between measuring a light source and
something illuminated by that light source.  Perhaps the inverse-square
law only applies the latter!

When i get two feet away from my monitor, it sure doesn't *seem* to be
four times as dim as when i'm one foot away!  And when i'm several
miles from Halfdome, it sure doesn't seem any dimmer than when i'm
right at the base.  And a light bulb doesn't seem to get any dimmer
when i back away from it.
--

- donl mathis at Silicon Graphics Computer Systems, Mountain View, CA

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