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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

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Section
BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

Unreasonable Results

A boy has a near point of 50 cm and a far point of 500 cm. Will a −4.00 D lens correct his far point to infinity?

To determine

Will the lens correct the far point of the boy to infinity?

Explanation

Given:

Near point, dnear=50cm

Far point, dfar=500cm

Power of the lens, P=4D

Formula used:

The power of the lens is given as

  P=1do+1di

Here,

  do is the distance of object

  di is the distance of the image

Calculation:

To correct the vision of a near sighted person the spectacle lens must an image 500cm from the eye for an object very far away

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