Elements of natural philosophy (Volume 2-3) (1850)
Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 197
which reflecting instrumentstins principle. £or ^ measurement of angles are constructed. DEVIATION OF LIGHT AT SPHERICAL SUPwFACES. Deviation of § 29. Let MD 0 JV, be a section of a spherical surface light at sphericalsurfaces; separating two me-dia of different den-sities, as air andglass, having… … and D S, the direction of this ray after deviation, whichbeing produced back will intersect the axis at F!. Thepoint 0, where the axis meets the surface, is called thevertex, which will, for the present, be taken as the origin.Call FD, u; F D, vl; CD,r; OF,f; 0 F, f ;and the angle 0 CD, 0. Now,…
Mechanics · Acoustics · Optics
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