Question

at what distance should an object be placed from a convex lens of focal length 18 cm to obtain an image at 36 cm from it what will be the magnification produced in this case​

Answer 1

Answer:

At what distance should an object be placed from a convex lens of focal length 18 cm to obtain an image at 36 cm from it ? What will be the magnification produced in this case? m=? ∴u=-36cm and u=-12cm.