Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 40
an image of AB at AB.This is a virtual image; it is erect and larger than the object. The magnifying power isgreater in proportion as the lens is more convex, and the object nearer the principal focus. Fig. 3,799 shows the formation of a real image, and fig. 3,800, theformation of a virtual image.…
Electrical engineering
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