Question

Determine how far an object must be placed in front of an converging lens of focal length 10 cm in order to produce an erect image of linear magnification 4.​

Answer 1

Answer:

The object should be placed 12.5cm front of converging lens

Answer 2

Answer:

Explanation:Here linear magnification is 4 cm and image is upward so it is taken positive .

Now by putting formula of linear magnification we get v=4u .And the put all the values in lens formula