The graph in Fig. shows plot of variation of `v` with change in `u` for a concave mirror. Points plotted above the point `P` on the curve are for values of `v` :
.

Options

A. smaller than `f`
B. smaller than `2f`
C. larger than `2f`
D. larger than `f` but less than `2f`

Answer

C

Explanation

In Fig. at `P`, `v u`, which is possible only when `u = 2f`.

At any other point `Q` above `P`, `v gt 2f`.