An object is placed in front of a spherical mirror at a very far distance and its image is observed to be formed highly diminished, virtual and upright. The mirror is
A
concave
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B
convex
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C
plane mirror
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D
either plane mirror or concave mirror
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Solution
The correct option is B convex Object is placed at very far distance i.e ∞. Thus, a highly diminished image will be formed at focus. Since, image is virtual and upright, it will be formed behind the mirror and therefore, it is a convex mirror.