COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 24, Problem 12QAP
To determine
Converging lenses are used to correct hyperopia and diverging lenses are used to correct myopia, explain why?
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Chapter 24 Solutions
COLLEGE PHYSICS
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- If the cornea is to be reshaped (this can be done surgically or with contact lenses) to correct myopia, should its curvature be made greater or smaller? Explain. Also explain how hyperopia can be corrected.arrow_forwardCan an image be larger than the object even though its magnification is negative? Explain.arrow_forwardSolve using optics theory: A coin is found at the bottom of a swimming pool. stuck to the wall of it. If the pool has a depth of 2 m and a person on that wall looks at the coin How deep is the coin for this person.?arrow_forward
- Calculate Combined Power Example 119. A simple microscope.is a combination of two lenses, in contact, of powers +15 D and +5 D.arrow_forwardProblem Solving a. A child with nearsighted can read a book at a near point 1 meter. In order to read at a normal reading distance of 25 cm, determine the power of the lens must use by the child.arrow_forwardThe image produced by a converging lens is upside down. Our eyes have converging lenses. Does this mean the images we see are upside down on our retinas? Explain.arrow_forward
- A cataract-impaired lens in an eye may be surgically removed and replaced by a manufactured lens. The focal length required for the new lens is determined by the lens-lo-retina distance, which is measured by a sonar-like device, and by the requirement that the implant provide for correct distance vision. (a) If the distance from lens to retina is 22.4 mm, calculate the power of the implanted lens in diopters. (b) Since there is no accommodation and the implant allows for correct distance vision, a corrective lens for close work or reading must be used. Assume a reading distance of 33.0 cm, and calculate the power of the lens in the reading glasses.arrow_forwardWill the focal length of a lens change when it is submerged in water? Explain.arrow_forwardWhat is the focal length of a makeup mirror that produces a magnification of 1.50 when a person’s face is 12.0 cm away? Explicitly show how you follow the steps in the ProblemSolving Strategy for Mirrors.arrow_forward
- Unreasonable Results Your friends show you an image through a microscope. They tell you that the microscope has an objective with a 0.500-cm focal length and an eyepiece with a 5.00-cm focal length. The resulting overall magnification is 250,000. Are these viable values for a microscope? Unless otherwise stated, the lens-to-retina distance is 2.00 cm.arrow_forwardPhotographers who are attempting to capture a large gathering of people will step away from the group and then refocus their lenses. Is the camera lens moved closer or further away from the sensor when the camera moves? Explain.arrow_forwardA lens can be used to start a fire by focusing an image of the sun onto a piece of flammable material. All other things being equal, would a lens with a short focal length or a long focal length be better as a fire starter? Explain.arrow_forward
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