A person cannot see the objects distinctly, when placed at a distance – InterviewSolution

1.

A person cannot see the objects distinctly, when placed at a distance less than 50 cm. Calculate the power and nature of the lens he should be using to see clearly the object placed at a distance of 25 cm from his eyes.

Answer»

f = 25d/d-25 = 25 x 50/ 50-25 = 50 cm

= 50/100 = 0.5m; P = 1/f = 1/0.5 = 2D

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