Invisible Light, Science lesson 14-10

posted Apr 8, 2013, 3:08 AM by Paul Schwan   [ updated Apr 8, 2013, 3:11 AM ]
Watch this review lesson BEFORE class on our review day. It takes about 20 seconds after you click PLAY before you hear any audio. Meanwhile, click the FULL SCREEN button in the lower-right corner to view the 17 minute video full screen on your netbook.

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