A concave mirror produces two times magnified real image of an object placed at 10 cm in front of it. Find the position of the image.
Distance of object, u=−10cm
Magnification, m=−2 since image is real
(−2)=−v−10cm
v=−20cm
The position of the image 20 cm in front of mirror, here negative sign indicats image will form in front of mirror.