Question

A person cannot see the object beyond
3 m distinctly. State the nature and focal length of the
lens required to correct this defect of vision.​

Answer 1

Answer:

Here is your answer, This is the case of farsightedness i.e. hypermetropia . A convex lens should be used. Focal length will be +3m . power of lens = ¹/f = ¹/3 = 0.333... dioptre.