Questions
A lens forms a diminished and erect image of an object.The magnification is ¼. Find the ratio of object distance and focal length .
detailed solution
Correct option is D
m=vu=14⇒v=u4The lens must be a concave lens.∴1−u4−1−u=1−f⇒u=3f⇒uf=3.Talk to our academic expert!
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