Question

a convex lens of focal length 0.12 m produces an image which is 3 times as long as the object.Find the distance between the object and the lens for a real image.

Answer 1

Answer:

the answer is -0.16m

Explanation:

1/v-1/u=1/f

1/3u+1/u=1/12

u is negative due to sign convention    

u= -16cm

u= -0.16m

Answer 2

Answer:

pls refer the above attachment kindly thank if helpfull...