In an experiment to find focal length of a concave mirror, a graph is drawn between the magnitudes of (u) and (v). The graph looks like.

Options

A.
B.
C.
D.

Answer

C

Explanation

(c ) In case of concave mirror, when we move the object from infinity to focus of the mirror (i.e., `mu` decreases from `oo` to `f`), the image moves from focus to `oo` (i.e., `v` increase from `f` to `oo`). Therefore, the graph looks like the curve shown in Fig.