What's an afterimage? Experience it for yourself - Science Snacks activity
Автор: Exploratorium Teacher Institute
Загружено: 2016-01-11
Просмотров: 42462
Описание:
Stare at one color, but see another. Can you make an image of a bird appear in an empty cage using just your eyes? In Part 1 of this video, experience the perceptual phenomenon called an afterimage. Watch the next video to find out what's going on and learn how to do this on your own.
You see color when receptor cells (called cones) in your eye’s retina are stimulated by light. There are three types of cones, and each is sensitive to a particular color range. If one or more of the three types of cones adapts to a stimulus because of long exposure, it responds less strongly than it normally would. Full instructions for this hands-on activity are available at: www.exploratorium.edu/snacks/bird-in-cage
Science Snacks are hands-on activities, projects, and experiments that are designed for the classroom and the curious. They're cheap, simple, safe, scientifically accurate, and teacher tested. Want to see more? Check out http://exploratorium.edu/snacks.
© 2015 Exploratorium, all rights reserved.
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