Question

a convex lens of focal length=10 is placed at the distance of 12 cm from a wall how far from the lens should an obj be placed so as to form its real image on the wall​

Answer 1

Answer:

place at a distance of 60 cm in front of the convex lens.

Explanation:

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.

Answer 2

Answer:

place at a distance of 60 CM in front of the convex lens .

this means that the distance of image from the convex lens for image distance will be 12cm since a real image is formed on the right side of lens so this image distance will be positive thus the object should be placed at a distance of 60 CM in front of the convex lens