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Hello Mike,
You can probably use phosphorescent film, used for making "shadow walls"
in museums. Not sure what light conditions are needed for it to work
properly. Try typing "phosphorescent" into the listserve archives to
find out where to buy it from.
If that doesn't work, how about a phototransistor? What about light
sensitive sunglasses? Or photosensitive ink?
http://www.ctiinks.com/applications/dq.html
BTW: What's the activity?
Good Luck!
Eric
Exhibit Developer
The Tech Museum
-----Original Message-----
From: Informal Science Education Network
[mailto:[log in to unmask]] On Behalf Of Kerkman, Mike
Sent: Tuesday, November 11, 2003 10:20 AM
To: [log in to unmask]
Subject: material that reacts to light
ISEN-ASTC-L is a service of the Association of Science-Technology
Centers Incorporated, a worldwide network of science museums and related
institutions.
************************************************************************
*****
Hello fellow list members,
Does anybody know of a good material that rather quickly reacts to
bright light? I don't know if this exists, but something like it would
be perfect for an activity we are planning. Ideally this material
wouldn't react to room-intensity light, but if a flashlight hit it, it'd
change color or something.
I know I am making this up entirely, but if there is something close
I know you all will know about it. Oh, and it's gotta be safe around
kids, of course. Thanks for any help you can offer. -mike k
Michael Kerkman
Botanical Educator
The Huntington Library, Art Collections, and Botanical Gardens
1151 Oxford Road
San Marino, CA 91108
626-405-3586
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