An object is 200 mm in front of a concave mirror which produces an upright image (erect image). The radius of curvature of the mirror is:

A) less than 200 mm


B) between 200 mm and 400 mm


C) exactly 400 mm


D) more than 400 mm

(D) Since the image formed is upright, the object lies within the focus of the concave mirror.

So, f > 200 mm


We know R = 2f


So, R > 400 mm


i.e. Radius of curvature is more than 400 mm.


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