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reading glasses of what power are needed for a person whose near point is 125 cm, so that he can read a computer screen at 55 cm? assume a lens–eye distance of 1.8 cm.

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The power of the lens is 1 D.

What is the power of the lens?

Given that we have the following;

Image distance = 125 cm - 1.8 cm = 123.2 cm

Object distance =  55 cm

Then we have;

1/f = 1/v + 1/u

f = focal length

u = object distance

v = image distance

1/f = 1/u - 1/v

1/f = 1/55 - 1/123.2

1/f = (0.018 - 0.0081)

f = 101 cm

Power = 100/101

power = 1 D

Learn more about power of a lens:https://brainly.com/question/13103657

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