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 108
the picture is parallel to the ground-speed. 2. How much more rapidly can the above territory be covered using a 20-inch focal length lens than with a 40-inch lens ifthe plane flies at the same altitude in each case? What willbe the scale of the map made with the 40-inch lens? 3. How large an area… … Figure 1. American Type L Camera in Operation.
Physics · Military art and science
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