Aconvex spherical mirror, whose focal length has a magnitude of 21.8 cm, is to form an image 12.2 cm behind the mirror. (a) where should the object be placed?
(b) what is the magnification of the mirror?

Explanation:

Focal length of convex mirror, f = -21.8 cm

Image distance, v = -12.2 cm

(a) Let u is the object distance. Using mirror's formula :

u = 27.70 cm

(b) The magnification of the mirror is the ratio of image distance to the object distance,

m = 0.44

Hence, this is the required solution.

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