For what position of an object, a concave mirror forms a real image equal in size to the object?
When an object is placed at the centre of curvature of a concave mirror, it forms a real image of a size equal to that of the object
Explanation
For an object placed at the centre of curvature $(C)$, the image formed by a concave mirror is real and inverted, of the same size as the object (equal) and at the centre of curvature $(C)$.
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