Question

A convex lens of focal length
10 cm is placed at a distance
of 60 cm from a screen. How
far from the lens should be
placed an object so as to
obtain a real image on the
screen?​

Answer 1

Answer:

This means that the distance of image from the convex lens or image distance will be 12 cm. Since a real image is fomred on the right side of the lens, so this image distance will be positive. Thus, the obect should be place at a distance of 60 cm in front of the convex lens.