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

In case of concave mirrorr, when we move the object from infinity to focus of the mirrorr `(i.e.,u` decreses from `oo` to `f)` , the image moves from focus to`oo(i.e., v` increases from `f` to `oo)`. Therefore, the graph looks like the curve shown in figure.