5th Edition

ISBN: 9780321976444

Author: James S. Walker

Publisher: PEARSON

Concept explainers

Optics is the study of light in the field of physics. It refers to the study and properties of light. Optical phenomena can be classified into three categories: ray optics, wave optics, and quantum optics. Geometrical optics, also known as ray optics, is…

Converging Lens

Converging lens, also known as a convex lens, is thinner at the upper and lower edges and thicker at the center. The edges are curved outwards. This lens can converge a beam of parallel rays of light that is coming from outside and focus it on a point on…

Plano-Convex Lens

To understand the topic well we will first break down the name of the topic, ‘Plano Convex lens’ into three separate words and look at them individually.

Lateral Magnification

In very simple terms, the same object can be viewed in enlarged versions of itself, which we call magnification. To rephrase, magnification is the ability to enlarge the image of an object without physically altering its dimensions and structure. This pr…

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Textbook Question

Chapter 27, Problem 23PCE

An optometrist prescribes contact lenses with a power of −0.75 diopter for you. What is your far- point distance?

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Chapter 27, Problem 22PCE

Chapter 27, Problem 24PCE

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The near point of a person's eye is 60.0 cm. What is the approximate power of the correcting lens that allows the person to clearly see objects placed 30.0 cm away? Neglect the eye-lens distance. O (A) -5.00 diopters O (B) -1.67 diopters C (C) +1.67 diopters O (D) +5.00 diopters Need Help? Read It

The near point of the eye is the closest distance at which the light from an object is focused on the retina and is clearly seen, while the far point of the eye is the the greatest distance for which a relaxed eye can clearly see. In the case of a nearsighted person, the eyeball is too long and so when looking at an object beyond the far point, the image formed by the eyeball's lens focuses in front of the retina, and so the image looks blurry. In the case of a farsighted person the eyeball is too short, meaning that when looking at an object closer than the near point, the image forms behind the retina. Optometrists and ophthalmologists usually prescribe corrective lenses measured

Contact Lenses. Contact lenses are placed right on the eyeball, so the distance from the eye to an object (or image) is the same as the distance from the lens to that object (or image). A certain person can see distant objects well, but his near point is 45.0 cm from his eyes instead of the usual 25.0 cm. (a) Is this person nearsighted or farsighted? (b) What type of lens (converging or diverging) is needed to correct his vision? (c) If the correcting lenses will be contact lenses, what focal length lens is needed and what is its power in diopters?

Chapter 27 Solutions

Physics (5th Edition)

Ch. 27.1 - If the f -number on a camera is increased does the...Ch. 27.2 - Prob. 2EYU Ch. 27.3 - A magnifying glass is held over a ruled piece of...Ch. 27.4 - Rank the following microscopes in order of...Ch. 27.5 - In a typical telescope, is foppose greater than,...Ch. 27.6 - One advantage of reflecting telescopes over...Ch. 27 - Prob. 1CQ Ch. 27 - Prob. 2CQ Ch. 27 - If your near-point distance is N, how close can...Ch. 27 - When you open your eyes underwater, everything...

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