Carhart, Henry S. (Henry Smith), 1844-1920 · Boston : Allyn and Bacon · leaf 267
s. 185. Convex Spherical Mirrors. — The formula ofArt. 181 is applicable to a convex mirror. In this case thecentre of curvature and the radiant point are on oppositesides of the mirror. If distances in front of the mirrorare still considered positive, r for this case is negative.The formula then… … In Fig. 116 the polished surface is on the convex side, C is its centre of curvature, ED is a rayparallel to the principal axis, and DH is itspath after reflection.It comes as if from F,which is therefore theprincipal focus midwaybetween A and 0.Fig. 117 shows the construction for the image in a…
Physics
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