Date: Sun Aug 19 23:30:07 2007

Author: Sam Sampere

Subject: Re: Physics Question of the Week

In the I cube experiments, the light through the cube starts bright and
then dims after a brief time interval. Is this real or an electronic



-----Original Message-----
From: [] On
Behalf Of Richard Berg
Sent: Sunday, August 19, 2007 10:31 PM
Subject: [tap-l] Physics Question of the Week


I have dreamed up some questions for our Question of the Week site and
would like to use you all as a filter, to see if (a) anyone understands
this, (b) anyone finds it interesting, and (c) anyone finds errors.

Click on:

and go to Questions and Answers #290, #291, and #292.

Admittedly, this may be a bit obscure, but I think they are interesting.

We came into possession of the little cubes, apparently originating from

Professor Costas Papaliolios (now deceased) of Harvard University
a somewhat circuitous route, back in about 1975, along with a one-page
list of the matrices that each cube symbolizes. I believe that I have
finally figured out what is in the cubes, and how they work.

Thanks for your help.


Dr. Richard E. Berg, Professor of the Practice
Director, Physics Lecture-Demonstration Facility
U.S. mail address:
Department of Physics
University of Maryland
College Park, MD 20742-4111
Phone: (301) 405-5994
FAX: (301) 314-9525