JEE Main 2006 + NEETMedium
Q.A convex lens forms real image of object at 40 cm. If object is moved 10 cm towards lens, image moves 20 cm away from lens. Focal length is
a
20 cm
b
15 cm
c
30 cm
d
10 cm
Correct Answer: Option A
The correct solution involves applying the fundamental concept to derive the final value step by step...