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Dictionary

New'ton's rings'

Optics.
the pattern of light interference produced by the contact of the convex surface of a lens with a plane glass plate, appearing as a series of concentric, alternately bright and dark rings, which are colored if the light source is white.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

Newton's method

new town

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