A machinist with normal vision has a near point at 25 cm. The machinist wears ey

Question

A machinist with normal vision has a near point at 25 cm. The machinist wears eyeglasses in order to do close work. The power of the lenses is +4.75 diopters. With these eyeglasses, the near point of the machinist, in cm, is closest to:
7 9 14 11 16 A machinist with normal vision has a near point at 25 cm. The machinist wears eyeglasses in order to do close work. The power of the lenses is +4.75 diopters. With these eyeglasses, the near point of the machinist, in cm, is closest to:
7 9 14 11 16
7 9 14 11 16 7 9 14 11 16

Explanation / Answer

Dipoters decrease the near point of eye. putting value in equation

1/f = 1/do + 1/di

near point = 14

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