Abstract
IT has been known for a long time that colours can be seen if a disk bearing a suitable black and white pattern is rotated at certain speeds. This was first observed by Fechner1 in 1838, but is more often demonstrated in the form of a top designed by Benham2 (Fig. 1a), which when spun produces rings of different colours. The effect has been studied in some detail3, but it has remained a rather isolated phenomenon ignored by most theories of vision.
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References
Fechner, G. T., Ann. Phys. Lpz., 45, 227 (1838).
Nature, 51, 113 (1894).
Erb, M. B., and Dallenbach, K. M., Amer. J. Psychol., 52, 227 (1939).
Bidwell, S., Proc. Roy. Soc., 61, 268 (1897).
Sperling, G., Science, 131, 1613 (1960).
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GREGORY, A. Interaction of Visual Stimuli. Nature 219, 734–735 (1968). https://doi.org/10.1038/219734a0
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DOI: https://doi.org/10.1038/219734a0
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