1.

A farsighted person cannot focus distinctly objects closer than 100 cm. The lens that will permit him to read from a distance of 50 cm, will have a focal length:A. +50 cmB. -50 cmC. +100 cmD. -100 cm

Answer»

A farsighted person cannot focus distinctly objects closer than 100 cm. The lens that will permit him to read from a distance of 50 cm, will have a focal length:

A. +50 cm

B. -50 cm

C. +100 cm

D. -100 cm



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