Question: An object is placed a distance r in front of a wall, where r exactly equals the radius of curvature of a certain concave mirror.

An object is placed a distance r in front of a wall, where r exactly equals the radius of curvature of a certain concave mirror. At what distance from the wall should this mirror be placed so that a real image of the object is formed on the wall? What is the magnification of the image?

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