Problems in physics. Derived from military situations and experience (1919)
United States. War Dept. Committee on education and special training, Dodge, Homer Levi, 1887- · [Washington? · leaf 175
of these planes? Should a reticule with a marked scale be placed in the instrumentas it is to appear or should it be reversed or turned upsidedown or both ? 44. In what place could a diaphragm be placed to sharply limit the field of view? 45. How does the position of the erecting system influence… … PORRO PRISMOBJECTIVE ERECTING SYSTEM Figure 5 TELESCOPE WITH PORRO PRISM ERECTING SYSTEM 48. Trace the rays through a pair of porro prisms. Is the image erected? 49. How many reflections do the rays undergo?
Physics · Military art and science
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