Question

When an object is placed in front of a concave mirror of focal length f, a virtual image is produced with a magnification of 2. To obtain a real image with a magnification of 2, the object has to be moved by a distance equal to

• A. $\frac{f}{2}$
• B. $\frac{2}{5f}$
• C. $f$
• D. $\frac{3}{2}f$

Answer 1

The correct option is C

$f$

Using, $m=-\frac{v}{u}$
Calculate the initial and final distance of object from the concave mirror.