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. Remarked by Grimaldi (1665), and referred by him to a property of light which he called diffraction. Whewell. Diffraction grating. (Optics) See under Grating. -- Diffraction spectrum. (Optics) See under Spectrum.

A deviation of the rays of light toward the surface of an opaque body; inflection; diffraction.

That produces diffraction.

ameters of minute particles or fibers, from the size of the colored rings produced by the diffraction of the light in which the objects are viewed.

One of a number of light or dark bands, produced by the interference of light; a diffraction band; -- called also interference fringe.

Same as Diffraction. Point of inflection (Geom.), the point on opposite sides of which a curve bends in contrary ways.

tinously, as that from an incandescent solid or liquid, or a gas under high pressure. -- Diffraction spectrum, a spectrum produced by diffraction, as by a grating. -- Gaseous spectrum, the spectrum of an incandesoent gas or vapor, under moderate, or especially under very low, pressure. It is characterized by bright b…