Whirling Watcher Activity: What's Going On (Clip)
Date: January 14, 2008
Running Time: 00:00:47
The science behind the Whirling Watcher stroboscope, including a discussion of the phenomenon called persistence of vision, which in this activity creates the illusion of a galloping horse.
Learn activities from the Exploratorium's Digital Library by watching how-to videos. Great for afterschool programs or at-home fun.
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