CONVEX MIRRORS. 



451 



produced backwards. The reflected rays take directions 

 as if they proceeded from a ; hence a is the image of A. 



FIG. 254. 



A ray of light incident in a direction perpendicular 

 to the surface of a convex mirror, that is in the direc- 



FIG. 255. 



tion of a radius of curvature, is reflected upon itself ; 

 rays parallel to the axis are reflected as if proceeding 

 from a point /, midway between the surface of the 



G G 2 



