Question

uv graph for convex mirror is shown in figure. If the magnification of a real object placed at $25\text{cm}$ from mirror is $\left(\frac{4}{x}\right)$, then $x$ is:

Answer 1

$f=25\Rightarrow \frac{1}{25}=\frac{1}{v}+\frac{1}{-25}\Rightarrow v=\frac{25}{2}$
$\Rightarrow m=\frac{-v}{u}=\frac{1}{2}$