I just used Snell.exe (available free at my site -below) to trace your
situation with no trouble. Try it!
Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net http://www.velocity.net/~trebor
----- Original Message -----
From: "Wolfgang Rueckner" <rueckner@FAS.HARVARD.EDU>
To: <PHYS-L@lists.nau.edu>
Sent: Thursday, April 18, 2002 10:58 AM
Subject: Re: ray tracing assumptions
. . .
Applying the lens equation to the convex lens, one obtains +19.8 cm.
Applying the lens equation again to the concave lens (using the image
of the convex lens as the object of the concave lens), one obtains
-63 cm. But one runs into a conceptual issue (which I tried to
explain in my first query) if you try to draw the ray diagrams for
this situation. Try it!