Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 117
Fig. 49.—Convergence of Light by Concave Minor. point where it falls on the mirror, and then draw anotherline from that point making the angle of reflection equalto that made by the incident ray, and we can considerthe small surface concerned in reflection flat, so that theray will in this case be… … Fk;. 50.—Coniuiiate Foci of Convex Mirror. any other ray, and perform the same operation we shallfind that it is also reflected nearly to f, and so on withall other parallel rays falling on the mirror ; and thispoint, F, is therefore said to be the focus of the mirror. CHAP. VII.] THE REFLECTION OF…
Astronomy · Telescopes
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