Question

A concave mirror produces $2$ times magnified real image of an object placed at $5cm$ in front of it. Where is image located?

• A. $10cm$
• B. $-5cm$
• C. $-10cm$
• D. $2.5cm$

Answer 1

The correct option is C $-10cm$

Magnification, $m=\frac{-v}{u}$
Given, magnification, $m=-2$

$-2=\frac{-v}{-5cm}$
Therefore, object distance, $v=-2\times 5cm=-10cm$