Annual report of the Board of Regents of the Smithsonian Institution . 2. Photograph of Mercury Ripples Diffracted byA Grid Smithsonian Report, 1929.—Compton PLATE 2 1 . A PATTERN OF 200 REGULARLY SPACED LINES WHICH WHENPHOTOGRAPHED ONTO A LANTERN SLIDE FORMS A DIFFRAC-TION Grating for Experiments on Light.

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Keywords: ., bookauthorsmithsonianinstitutio, bookcentury1800, bookdecade1840