Technical data Diffraction at a crossed grating with laserArticle no: P1196201 Principle A crossed grating consists of two systems of diffraction slits positioned at right angles to each other. This can best be accomplished by crossing two line gratings. When light is diffracted from a crossed grating, it produces interference patterns with a reticular structure. If the crossed gratings have the same grating constant, the mesh shape will be square, and if not it will be rectangular. In the experiment the two gratings employed have grating constants in the ratio of 1 : 2; hence diffraction patterns with rectangular mesh holes are produced, the sides of which are in the ration of 2 : 1. Benefits
Tasks Direct a parallel, narrow beam of Iight onto two line gratings positioned crosswise to each other, and investigate the ensuing interference patterns. Scope of delivery
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