Elementary optics and applications to fire control instruments (1922)
United States. Army. Ordnance Dept · Washington, Govt. Print. Off. · leaf 14
Fig. 3.—Angle of incidence equal to critical angle. D B Fig. 4.—Angle of incidence greater than criticalangle. THE DISPERSION OF LIGHT. Let FGH, figure 5, be the cross section of a prism of glass boundedby the polished faces FG and FH. The angle a between these facesis termed the refracting angle…
Optics · Optical instruments · Fire control (Gunnery) -- Optical equipment
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
