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Building Technologies to Seek the Invisible

posted Jul 23, 2011, 2:07 PM by Marc Berthoud   [ updated Jan 4, 2012, 10:56 AM by Margie Corp ]
December 11, 2010  ARCS teacher Ed Sadler leads the discussion and construction of devices which detect invisible infrared light rays.  Adaptable for students of different abilities, these detectors help illustrate basic principles of optics. 

Click here to read more and access lesson details.