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Interactive
Boston University

Boston University: Project Lite: Motion

For Students 9th - 10th
A large collection of online activities for exploring how our eyes perceive real and apparent motion.
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Activity
Exploratorium

Exploratorium: Science Snacks: Whirling Watcher

For Students 9th - 10th
Make a stroboscope and investigate how to make it seem like the image you look at appears to move.