Date: Wed, 03 Dec 2003 12:39:58 -0700

Author: Jerry DiMarco

Subject: Re: seeing colors

Post:

Zig,

This sounds like an interesting demo. How fast does the disc turn?

Jerry

P.S. The other reason is inflation...


At 11:01 AM 12/3/2003, you wrote:
>Machele and interested Taplers, I have the demo on the shelf here and it works
>beautifully.
> It consists of a red [primary] light behind a motorized disc. The
> disc has a hole out
>on the edge through which the red light shines. The disc is painted one
>half black one
>half white through the center of the hole that the red light can be seen
>through. The
>disc is also motorized about its center with a DC motor allowing it to be
>instantly
>reversed
> When the disc rotates counterclockwise the red light is followed by
> the black half of
>the disc and one sees nothing, but when the disc rotates clockwise the
>white half of the
>disc follows the flash of red light then you see a very distinct turquoise
>green image
>most people don't even see the red flash. This reversing is done quickly
>with a reversing
>switch on the motor.
> The demonstration is done in a darkened room with a bright white
> light shining on the
>disc and nowhere else, a very bright light from a projector or spotlight
>is ideal.
> When I have shown this to people they Oh and Ahh loudly.
> It is difficult to claim either persistence of vision or saturation
> effects without a
>fair degree of hand waving in either case.
>
> My two bits worth, which are getting deflated due to my age and I
> can't remember the
>other reason. Zig
From cablem@wfu.edu Wed Dec 3 14:54:50 2003
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Date: Wed, 03 Dec 2003 14:54:50 -0500
From: Machele Cable
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To: tap-l@listproc.appstate.edu
Subject: Re: Simple CAD wanted - Mac
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Eric,
I'm not on a mac, but these popped up at download.com for your operating
system. It's a starting place.
http://download.com.com/3120-20-0-1-0.html?qt=drawing&author=&titlename=&desc=&dlcount=&daysback=&swlink=&os=93&li=&dlsize=&ca=

Chele

Eric Ayars wrote:

> Any Mac users out there with a suggestion for a similar program on Mac
> OS X?
>
> Eric
>
> On Wednesday, December 3, 2003, at 06:04 AM, Gerald Zani wrote:
>
>> Tappers,
>>
>> Wow!! No shortage of choices. Thanks for all the many, quick and
>> good answers for the question about a simple to learn CAD program.
>>
>> Here is a list of all the recommendations:
>>
>> Smartdraw http://www.smartdraw.com/specials/floorplans.asp
>>
>> Autosketch
>> http://usa.autodesk.com/adsk/servlet/index?siteID=123112&id=2753027
>>
>> Quickie Engineer
>> http://download.com.com/3000-6677-10201442.html?tag=lst-0-4
>>
>> 3d Home Architect
>>
>> ArchiCAD
>>
>> Autodesk 2000i of even Autodesk light
>>
>> TurboCAD ver 8.0
>>
>> Archway systems VersaCad
>> http://www.archwaysystems.com/archway/vcad2003-9pressrelease.htm
>>
>> Design Cad
>>
>> Solidworks
>>
>> 2D version of TurboCAD
>>
>> QuickCadd
>>
>>
>>
>> Thanks again Tapper folks,
>> Freezing cold here, with a bone dry, bone chilling wind. About 15
>> degrees last night. Left over turkey soup warms the stomach all
>> right. JZ
>>
>> Gerald Zani e-mail: Gerald_Zani@brown.edu
>> Manager of Demonstrations phone: (401) 863-3964
>> Department of Physics FAX: (401) 863-2024
>> Brown University Providence, RI 02912-1843 USA
>>
>> URL http://www.physics.brown.edu/users/staff/zani/index.html
>> URL http://www.physics.brown.edu/Studies/Demo/
>>
>> Do a little more of that work which you have confessed to be good,
>> Which you feel that society and your most Just Judge rightly demand
>> of you.
>> Cultivate the tree which you have found to bear fruit in your soil.
>> If you have any experiments you would like to try, try them.
>> Now's your chance.
>> Henry David Thoreau, Journal entry, 1850.
>>
>>
> -----------------------------------------------------------------
> Dr. Eric Ayars
> Assistant Professor of Physics
> California State University, Chico
> ayars@mailaps.org
>
>
> -----------------------------------------------------------------
> Dr. Eric Ayars
> Assistant Professor of Physics
> California State University, Chico
> ayars@mailaps.org
>
>
>

--
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Machele Cable Lab Manager Physics WFU
Phone: (336) 758-5532 Fax: (336) 758-6142
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but I can usually shut her up with some chocolate!

From thomason@colorado.edu Wed Dec 3 15:13:30 2003

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