Question

A beam of light passing through a diverging lens of focal length 0.3m appear to be focused at a
distance 0.2m behind the lens. Find the position of the object.

Answer 1

f=- 0.3 m ,v =-0.2 m

1f=1v−1u

1u=1v−1f

1u=1−0.2−1−0.3

=−106

u=−610=−0.6m