. Biographies of distinguished scientific men. Scientists. 142 MALUS. tliis point then, they would say, that Wollaston was de- ceived. The object which Malus proposed in his memoir was to submit this point to a decisive experimental test. He chose a substance, beeswax, whose refractive power could be measured in the transparent state, and in the opaque state by the method of Wollaston. He applied to the angles of disappearance corresponding to these two conditions, and sufficiently different one from the other, the formulas of the Mecanique Celeste, and he found there would result refractive p
. Biographies of distinguished scientific men. Scientists. 142 MALUS. tliis point then, they would say, that Wollaston was de- ceived. The object which Malus proposed in his memoir was to submit this point to a decisive experimental test. He chose a substance, beeswax, whose refractive power could be measured in the transparent state, and in the opaque state by the method of Wollaston. He applied to the angles of disappearance corresponding to these two conditions, and sufficiently different one from the other, the formulas of the Mecanique Celeste, and he found there would result refractive powers perfectly identical. This For refraction; by an analogous construction, the circles which. spread in the denser medium are smaller than those in the first, the radii being diminished in the ratio of the velocities or inversely as the densities. Thus when the new wave originating at o' has spread to r/, that from o will have spread to douhle the same radius at v. The com- mon tangent or front of the refracted waves will be inclined at an angle o t V, which is easily determined by drawing the parallel through t of the incident light, whence we have (i and r being the angles of inci- dence and refraction) u t=o i sin. i, and o v=o i sin. r; but o v and u t being the radii of waves in the two media, are in the constant ratio of the densities =,ti; hence sin. i =ft sin. r, which is the experimental law of 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
Size: 1841px × 1357px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, bookpublisherbosto, bookyear1859
