A converging lens of focal length 10cm forms an erect image three times the size of the real object. Calculate the distance between the image and the object.

A. 6.6cm
B. 11.1cm
C. 13.3cm
D. 20.0cm

Correct Answer: Option C

Explanation

Given, image size = 3U

object size = U

focal length = 10cm

lens to object distance = (focal length×object size) / imagesize
= 10×u/3u = 3.33
distance between image and object = 10 + 3.33 = 13.33cm