Question

At what distance should an object be placed from a convex lens of focal length 18 cm to obtain an image of 24 cm from it on the other side what will be the magnification produced in this case and image distance is ____________

Answer 1

Use lenses formula
1/f = 1/v-1/u
1/18=1/24-1/u
U = - 72cm
Magnifications m = v/u =24/(-72)
-1/ 3
And image formed is inverted -ve sign show that
image distance is 24cm.