PSN-L Email List Message

Subject: RE: Lehman seismometer movement
From: Jack Ivey ivey@..........
Date: Mon, 14 Mar 2011 13:41:01 -0400

Has anyone tried to see real-time boom=20
movement by setting up a mirror and=20
laser pointer as an optical lever?
I set one up one time with little=20
result, but I didn't try very hard.

There are drawings of such a thing for
photocell position detection from
some of the early Amateur Scientist=20


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