Magic Wand - Tech Learning

Magic Wand

When you view a slide show or a movie, where is the picture? This activity (aka "snack") provides instructions for investigating light and human vision using a pencil and a slide projector.
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When you view a slide show or a movie, where is the picture? This activity (aka "snack") provides instructions for investigating light and human vision using a pencil and a slide projector.

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