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| Motion | 1 |
| Optics | 1 |
| Science Activities | 1 |
| Science Education | 1 |
| Scientific Concepts | 1 |
| Visual Perception | 1 |
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| Scientific American | 1 |
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| Walker, Jearl | 1 |
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| Journal Articles | 1 |
| Reports - General | 1 |
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Walker, Jearl – Scientific American, 1984
Discusses how to stop a spinning object (such as rotating fan blades) by humming and the perception of curious blue arcs around a light. Background information, relevant research, and activities related to these two topics are provided. (JN)
Descriptors: Motion, Optics, Science Activities, Science Education
