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Walker, Jearl – Scientific American, 1986
Methods and optics of perceiving color in a black-and-white grating are described. A sample grating which produces the effect is included. (JN)
Descriptors: Color, Optics, Perception, Science Experiments
Walker, Jearl – Scientific American, 1978
Describes an experiment revealing a visual latency effect produced by the wearing of sunglasses. (SL)
Descriptors: Eyes, Optics, Research, Science Education
Walker, Jearl – Scientific American, 1979
A discussion of Edwin Land's experiments with color images from black-and-white photographs. Information is presented for duplication of these experiments by the amateur photographer. (BB)
Descriptors: Color, Eyes, Photography, Physics