Elements of natural philosophy (Volume 2-3) (1850)
Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 352
Iceland spar, These values forIceland spar j. m0 = 1,6543,me = 1,4833; hence, Its naturededuced fromformula (112); A = 0,60449,B = 0,67417; the ellipsoid is, therefore, oblate ; and the coefficient ofsin2 d, negative. Tourmaline, beryl, emerald, apatite, &c,also belong to this class. Quartz,… … § 148. If a plane waveW W\ of common light beincident on the upper sur-face of a crystal of Icelandspar to which it is parallel,this wave will be resolvedinto two components, one ofwhich will take the directionof and be normal to an ob-lique line P e, and will berefracted according to…
Mechanics · Acoustics · Optics
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