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O2-03: PERSISTENCE OF VISION - MAGIC WAND 9 years 6 months ago #1161

  • zzfixk21
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ID Code: O2-03
Purpose: Demonstrates the persistence of vision
Description: The slide of Einstein (or any of your favorite slides) is focused a few feet from the projector, but unfocused where it strikes any surface on which it might be identifiable. When a white stick pointer is moved rapidly up and down through the focal plane the image of Einstein can easily be identified.
Availability: Available

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