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  3. A diminished image of an object is to be obtained on a screen 1.0 m from it. This can be achieved by appropriate placing :

. A diminished image of an object is to be obtained on a screen 1.0 m from it. This can be achieved by appropriate placing :

(a) a concave mirror of suitable focal length

            (b) a convex mirror of suitable focal length

            (c) a convex lens of focal length less than 0.25 m

            (d) a convex lens of suitable focal length

 

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