In 1827 Charles Wheatstone described a device he called the ‘‘kaleidophone.’’ Its purpose was to illustrate the persistence of vision of the human eye, but it also provided a means of generating those curves that have come to be known as ‘‘Lissajous curves.’’ Wheatstone’s kaleidophone and related curve tracing apparatus will be described.
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© 1993 American Association of Physics Teachers.
1993
American Association of Physics Teachers
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