Subject: | |
From: | |
Reply To: | |
Date: | Fri, 21 Aug 2009 13:25:59 -0500 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related institutions.
*****************************************************************************
David Savory wrote:
> ISEN-ASTC-L is a service of the Association of Science-Technology Centers
> Incorporated, a worldwide network of science museums and related institutions.
> *****************************************************************************
>
> 2-shay with respect to play.
>
> As for playful alternatives to a laser maze, I have always been partial to bouncing the light off mirrors that wobble as they rotate creating Lissajous patterns. Oldsters will be reminded of spirograph pattens. Youngsters will be amazed afresh.
>
> David Savory
> Community Extensions Program Developer and Exhibit Curator
> Science World British Columbia
That is the basis of a Thorton Scanner. Actually, you put the mirrors
on low RPM motors with
potentiometers controlling speed and you can get some interesting shapes
if you use three
mirror/motors. This is much much better, BTW, then using mirrors on
speaker cones.
Back to the fog question - the cheaper DJ type foggers do leave
residue. The best fogger
I have seen was built in Quebec, Canada and used a water based mist.
They used
this at the International Laser Display awards several years and I was
impressed with it.
No residue and doesn't make a fog that is so thick you can't see
anything else.
Of course, it wasn't cheap like the oil-based fog machines.
--
Clear DARK Skies,
Jack Dunn - Mueller Planetarium
***********************************************************************
For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org.
Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org.
The ISEN-ASTC-L email list is powered by LISTSERVR software from L-Soft. To learn more, visit
http://www.lsoft.com/LISTSERV-powered.html.
To remove your e-mail address from the ISEN-ASTC-L list, send the
message SIGNOFF ISEN-ASTC-L in the BODY of a message to
[log in to unmask]
|
|
|