A convex mirror has radius of curvature of 20 cm. An object is placed at such a distance from the mirror that the size of image is exactly half that o
A convex mirror has radius of curvature of 20 cm. An object is placed at such a distance from the mirror that the size of image is exactly half that of the object. The object must be at :-
A. 20 cm
B. 30 cm
C. 10 cm
D. 40 cm
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