## moiré patternMoiré is
the French word for "silk", the method of making the fabric that shows the
familiar shifting patterns, now known as silk moiré, having been
introduced from China to France in 1754. Moiré patterns arre used in industry to determine, for example, the degree of flatness of a surface, They are also used as mathematical models of physical phenomena, and occasionally in the solution of mathematical problems. Their disturbing optical properties are of interest in psychology. ## Related category• ILLUSIONS AND IMPOSSIBLE FIGURES | ||||||

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