Date: Tue, 6 Jan 1998 09:41:21 -0800 (PST)
Message-Id: <199801061741.JAA14040@isaac.exploratorium.edu>
To: "Pinhole Listserv" <pinhole@exploratorium.edu>
From: Truckee High Science Department <tthssci@placercoe.k12.ca.us>
Subject: Overhead Projectors
Does any one have a good ray diagram of an overhead projector? My students
are reporting on various optical instruments. It has been easy to find ray
diagrams for the other instruments, but I have never seen a "professional"
diagram for the overhead. The students have been dissecting the machine,
but I would love to see someone else's version. Any hints? Thanks for the help
Sue Lowder
Truckee High School