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