A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power

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KollegeApply · Accepted Answer

– 0.5 D Explanation - The person is suffering from myopia. He needs a concave lens and hence power would be negative. Object distance, u = - $\infty$ Image distance, υ = -2 m Using lens formula 1/upsilon - 1/"u" = 1/"f" 1/f = 1/(-2) - 1/$\infty$ f = -2 m `P = 1/f = -1/(2 "m") = -0.5 "D"`

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