ISEN-ASTC-L is a service of the Association of Science-Technology Centers Incorporated, a worldwide network of science museums and related institutions. ***************************************************************************** Mike- You could use a photo-detecting circuit. A bright light causes something else to start. Ed Ed Sobey, Ph.D. Northwest Invention Center 2420 178th NE Redmond, WA 98052 (425) 861-8685 www.invention-center.com www.invention-engine.com www.kidsinvent.org www.inventionfact.com ----- Original Message ----- From: "Kerkman, Mike" <[log in to unmask]> To: <[log in to unmask]> Sent: Tuesday, November 11, 2003 10:19 AM 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 > [log in to unmask] > > *********************************************************************** > More information about the Informal Science Education Network and the > Association of Science-Technology Centers may be found at http://www.astc.org. > 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] *********************************************************************** More information about the Informal Science Education Network and the Association of Science-Technology Centers may be found at http://www.astc.org. 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]