Physics
JAMB 2011
An image in a convex lens is upright and magnified 3 times. If the focal length of the lens is 15 cm, what is the object distance?
-
A.
10 cm
-
B.
25 cm
-
C.
16 cm
-
D.
14 cm
Correct Answer: Option A
Explanation
m =
v/
u = -3
v = -3u
f = 15cm
1/
v +
1/
U =
1/
f
1/
-3U +
1/
u =
1/
15
2/
3u =
1/
15
3U = 15 x 2
U =
30/
3
= 10 cm
There is an explanation video available below.
Report an Error
Ask A Question
Download App
Explanation Video
Quick Questions
Contributions ({{ comment_count }})
Please wait...
Modal title
Report
Block User
{{ feedback_modal_data.title }}