An object is 6.0 cm from a thin lens along the axis of the lens.If the lens has a focal length of 9.0 cm,determine the image distance.
A)-18 cm
B)+18 cm
C)-3 cm
D)+3 cm

Question

Quizplus · Accepted Answer

The lens formula is 1/f = 1/v + 1/u, where f is the focal length, v is the image distance, and u is the object distance. Substituting f = 9.0 cm and u = -6.0 cm (object distance is taken as negative for a real object in lens formula convention), solving for v gives v = -18 cm, indicating the image is virtual and located on the same side as the object.

An Object Is 6