A) 0.5 m
B) 0.75 m
C) 1.0 m
D) 1.5 m
Correct Answer: B
Solution :
To obtain a real image on a screen, the minimum distance \[({{X}_{\min }})\] between the object and the screen is 4f, where f is the focal length of the lens. Conversely, for a fixed distance between the object and the screen, the convex lens should have a maximum focal length of \[{{f}_{\max }}=\frac{{{X}_{\min }}}{4}=\frac{3}{4}=0.75\,m.\] Hence, the correction option is (b).
You need to login to perform this action.
You will be redirected in
3 sec
