College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
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Textbook Question
Chapter 26, Problem 18PE
A myopic person sees that her contact lens prescription is −4.00 D. What is her far point?
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Chapter 26 Solutions
College Physics
Ch. 26 - If the lens of a person’s eye is removed because...Ch. 26 - A cataract is cloudiness in the lens of the eye....Ch. 26 - When laser light is shone into a relaxed...Ch. 26 - How does the power of a dry contact lens compare...Ch. 26 - Why is your vision so blurry when you open your...Ch. 26 - It has become common to replace the...Ch. 26 - If the cornea is to be reshaped (this can be done...Ch. 26 - If there is a fixed percent uncertainty in LASIK...Ch. 26 - A person with presbyopia has lost some or all of...Ch. 26 - A pure red object on a black background seems to...
Ch. 26 - What is color constancy, and what are its...Ch. 26 - There are different types of color blindness...Ch. 26 - Propose a way to study the function of the rods...Ch. 26 - Geometric optics describes the interaction of...Ch. 26 - The image produced by the microscope in Figure...Ch. 26 - Why not have the objective at a microscope form a...Ch. 26 - What advantages do oil immersion objectives offer?Ch. 26 - How does the NA of a microscope compare wi1h the...Ch. 26 - If you want your microscope or telescope to...Ch. 26 - List the various types of aberrations. What causes...Ch. 26 - What is the power of the eye when viewing an...Ch. 26 - Calculate the power at the eye when viewing an...Ch. 26 - (a) The print in many books averages 3.50 mm in...Ch. 26 - Suppose a certain person’s visual acuity is such...Ch. 26 - People who do very detailed work close up, such as...Ch. 26 - What is the far point of a person whose eyes have...Ch. 26 - What is the near point of a person whose eyes have...Ch. 26 - (a) A laser vision correction reshaping the cornea...Ch. 26 - In a LASIK vision correction, the power of a...Ch. 26 - What was the previous far point of a patient who...Ch. 26 - A severely myopic patient has a far point of 5.00...Ch. 26 - A student’s eyes, while reading the blackboard,...Ch. 26 - The power of a physician’s eyes is 53.0 D while...Ch. 26 - A young woman with normal distant vision has a...Ch. 26 - The far point of a myopic administrator is 50.0...Ch. 26 - A very myopic man has afar point of 20.0 cm. What...Ch. 26 - Repeat the previous problem for eyeglasses held...Ch. 26 - A myopic person sees that her contact lens...Ch. 26 - Repeat the previous problem for glasses that are...Ch. 26 - The contact lens prescription for a mildly...Ch. 26 - A nearsighted man cannot see objects clearly...Ch. 26 - A mother sees that her child's contact lens...Ch. 26 - Repeat the previous problem for glasses that are...Ch. 26 - The contact lens prescription for a nearsighted...Ch. 26 - Unreasonable Results A boy has a near point of 50...Ch. 26 - A microscope with an overall magnification of 800...Ch. 26 - (a) What magnification is produced by a 0.150 cm...Ch. 26 - (a) Where does an object need to be placed...Ch. 26 - You switch from a 1.40NA60X oil immersion...Ch. 26 - An amoeba is 0.305 cm away from the 0.300 cm focal...Ch. 26 - You are using a standard microscope with a...Ch. 26 - Unreasonable Results Your friends show you an...Ch. 26 - What is the angular magnification of a telescope...Ch. 26 - Find the distance between the objective and...Ch. 26 - A large reflecting telescope has an objective...Ch. 26 - A small telescope has a concave mirror with a 2.00...Ch. 26 - A 7.5x binocular produces an angular magnification...Ch. 26 - Construct Your Own Problem Consider a telescope of...Ch. 26 - Integrated Concepts (a) During laser vision...
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- If the lens of a person’s eye is removed because of cataracts (as has been done since ancient times), why would you expect an eyeglass lens of about 16 D to be prescribed?arrow_forwardThe contact-lens prescription for a nearsighted person is —4.00 D and the person has a far point of 22.5 cm. What is the power of the tear layer between the cornea and the lens if the correction is ideal, taking the tear layer into account?arrow_forwardA converging lens made of crown glass has a focal length of 15.0 cm when used in air. If the lens is immersed in water, what is its focal length? (a) negative (b) less than 15.0 cm (c) equal to 15.0 cm (d) greater than 15.0 cm (e) none of those answersarrow_forward
- A mother sees that her child’s contact lens prescription is 0.750 D. What is the child’s near point?arrow_forwardShow that the magnification of a thin lens is given by M = di/do (Eq. 38.6). Hint: Follow the derivation of the lens makers equation (page 1233) and start with a thick lens.arrow_forwardA point source of light is 50 cm in front of a converging lens of focal length 30 cm. A concave mirror with a focal length of 20 cm is placed 25 cm behind the lens. Where does the final image form, and what are its orientation and magnification?arrow_forward
- What is the focal length of a magnifying glass that produces a magnification of 3.00 when held 5.00 cm from an object, such as a rare coin?arrow_forwardA lamp of height S cm is placed 40 cm in front of a converging lens of focal length 20 cm. There is a plane mirror 15 cm behind the lens. Where would you find the image when you look in the mirror?arrow_forwardFor a normal, relaxed eye, a magnifying glass produces an angular magnification of 4.0. What is the largest magnification possible with this magnifying glass?arrow_forward
- A diverging lens has a focal length of magnitude 20.0 cm. (a) Locate the image for object distances of (i) 40.0 cm, (ii) 20.0 cm, and (iii) 10.0 cm. For each case, state whether the image is (b) real or virtual and (c) upright or inverted.(d) For each case, find the magnification.arrow_forwardHow far should you hold a 2.1 cm-focal length magnifying glass from an object to obtain a magnification of 10 x ? Assume you place your eye 5.0 cm from the magnifying glass.arrow_forwardA converging lens has a focal length of 10.0 cm. Locate the object if a real image is located at a distance from the lens of (a) 20.0 cm and (b) 50.0 cm. What If? Redo the calculations if the images are virtual and located at a distance from the lens of (c) 20.0 cm and (d) 50.0 cm.arrow_forward
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Convex and Concave Lenses; Author: Manocha Academy;https://www.youtube.com/watch?v=CJ6aB5ULqa0;License: Standard YouTube License, CC-BY