. Biographies of distinguished scientific men. Scientists. 308 THOMAS YOUNG. observe only a partial weakening of intensity, sometimes, on the other hand, the rays conspire and increase the illumination. Every thing depends on the difference in the length of route which they have gone through, and. each other in the inside of the shadow; in either case giving stripes or bands. To complete the proof, when an opaque screen was placed so as to intercept the rays on one side, though abundance of light was present on the other, yet all the internal bands immediately disap- peared; demonstrating that
. Biographies of distinguished scientific men. Scientists. 308 THOMAS YOUNG. observe only a partial weakening of intensity, sometimes, on the other hand, the rays conspire and increase the illumination. Every thing depends on the difference in the length of route which they have gone through, and. each other in the inside of the shadow; in either case giving stripes or bands. To complete the proof, when an opaque screen was placed so as to intercept the rays on one side, though abundance of light was present on the other, yet all the internal bands immediately disap- peared; demonstrating that the effect was due solely to the concur- rence of the light from bvth sides. The bands produced by light admitted through narrow apertures, and nuraei-ous other phenomena of the same kind, may receive a general and popular explanation in the same way.— Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Arago, F. (François), 1786-1853; Smyth, W. H. (William Henry), 1788-1865; Powell, Baden, 1796-1860; Grant, Robert, 1814-1892; Fairbairn, William, Sir, 1789-1874. Boston, Ticknor and Fields
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Keywords: ., bookcentury1800, bookdecade1850, bookpublisherbosto, bookyear1859
