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You can tell whether people are nearsighted or farsighted

Physics: Principles with Applications | 6th Edition | ISBN: 9780130606204 | Authors: Douglas C. Giancoli ISBN: 9780130606204 3

Solution for problem 6Q Chapter 25

Physics: Principles with Applications | 6th Edition

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Physics: Principles with Applications | 6th Edition | ISBN: 9780130606204 | Authors: Douglas C. Giancoli

Physics: Principles with Applications | 6th Edition

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Problem 6Q

You can tell whether people are nearsighted or farsighted by looking at the width of their face through their glasses. If a person's face appears narrower through the glasses (Fig. 25-47), is the person farsighted or nearsighted? Try to explain, but also check experimentally with friends who wear glasses.

Step-by-Step Solution:

Step-by-step solution

Step 1 of 2</p>

Concept

Lens thicker at the Centre than at the edges is a converging lens. Lens thinner at the Centre than at the edges is a diverging lens. A diverging lens always forms a virtual image that will be upright and smaller than the object, regardless of the position of the object.

Normal eye focuses light and produces a sharp image, just like a camera. The cornea-lens system focuses light onto the back surface of the eye called retina. A person, who can see distant objects clearly but cannot focus on near objects is farsighted. Farsightedness is corrected with a converging lens. A person, who can see near objects clearly but cannot focus on distant objects is nearsighted and is corrected with a diverging lens.

Step 2 of 2

Chapter 25, Problem 6Q is Solved
Textbook: Physics: Principles with Applications
Edition: 6
Author: Douglas C. Giancoli
ISBN: 9780130606204

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You can tell whether people are nearsighted or farsighted

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