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1.  If the magnification is greater than 1 (m < -1) ,  the concave mirror is used for the experiment.

 A real object is placed between the focus and center of curvature. It forms an inverted real image.


If the real object is kept with in the focus of the concave mirror, then a virtual image is formed.
In this case also the magnification is more than 1. (m > +1)
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