In order to obtain a magnification of −2 (minus 2) with a concave mirror, the object should be placed:(a) between pole and focus (b) between focus and centre of curvature(c) at the centre of curvature (d) beyond the centre of curvature

Explanation

Given:

Magnification, $m$ =$-$2

Here, magnification is with the positive sign $(-)$, which implies that the image is real and inverted.

$\because m>1\Rightarrow $ the size of the image is greater than that of the object (enlarged).

In the case of the concave mirror, both of the above-mentioned conditions are only possible when the object is placed between its focus $(F)$ and centre of curvature $(C)$ in front of the mirror.