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 21
a placewhere no object exists. Ques. What is the difference between a real and avirtual image? Ans. A real image is formed when the rays actually meet;a virtual image is formed when the rays only appear to meet. MOTION PICTURES 2,675 Ques. What is a mirror? Ans. A polished surface which reflects…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
