Date: Tue Sep 4 17:08:46 2007

Author: John Welch

Subject: Re: Physics Question of the Week

Post:
I also had a lack of patience for reading it all, though it looks like a
really cool activity. Perhaps a video or something could reduce some the
words needed to explain the situation?

Urs Lauterburg wrote:
> Dick,
>
> This seems to be a great demonstration although I haven't been able to
> fully understand what exactly is going on here. I assume polarization
> filters and quarter wave plates and their different relative
> orientations to be involved. I guess I am not patient enough to
> analyze all the combinations throughly in order to derive all possible
> states. I would get a bad grade from you for this laziness too.
>
> Well I always gave up when playing with a Rubik cube for a while
> too... for this I would actually prefer to use LabVIEW see:
>
> http://www.youtube.com/watch?v=TLnDuFkQUdc
>
> Regards
>
> Urs
>
> Urs Lauterburg
> Physics demonstrator
> Physikalisches Institut
> University of Bern
> Switzerland
>
>> Folks,
>>
>> 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:
>>
>> http://www.physics.umd.edu/lecdem/outreach/QOTW/new/new.htm
>>
>> 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 through 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.
>>
>> Dick
>>
>> ***********************************************************************
>> 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
>> e-mail reberg@umd.edu
>> www.physics.umd.edu/lecdem
>> ***********************************************************************
>
>
>

--
******************************
John Welch

Cabrillo College Physics Dept.



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