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 38
points. Theselines are the normals. Construct the angles of reflection and extend the rays until theymeet. It is found in this case that the image AB is virtual, erect, smaller than the object,and located on the opposite side of the mirror. The effect of a convex mirror is to makeconvergent rays… … Fig. 3,799.—Formation of real image by double convex lens. Let AB be placed beyond theprincipaliocus. If a secondary axis AA be drawn from the outside point A, any ray ACfrom this point will be twice refracted at C and D, and both turning in the same direction,approaching the secondary axis, which…
Electrical engineering
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