Newton disc


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New·ton disc

(nū'tŏn),
a disc on which are seven colored sectors, each occupying proportionally the same space as the corresponding primary color in the spectrum; when the disc is rapidly rotated it appears white.

New·ton disc

(nū'tŏn disk)
A disc on which are seven colored sectors, each occupying proportionally the same space as the corresponding primary color in the spectrum; when the disc is rapidly rotated it appears white.
[Sir Isaac Newton, 1643-1727, English physicist]