COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 24, Problem 30QAP
To determine
The focal length of the lens in a mobile phone's camera when it is focused on a distant object
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• It has become common to replace the cataract-clouded lens of the
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without glasses? If the person was nearsighted, is the power of the
intraocular lens greater or less than the removed lens?
It has become common to replace the cataract-clouded lens of the eye with an internal lens. This intraocular lens can be chosen so that the person has perfect distant vision. Will the person be able to read without glasses? If the person was nearsighted, is the power of the intraocular lens greater or less than the removed lens?•
•• A certain telescope uses a concave spherical mirror that
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31
Chapter 24 Solutions
COLLEGE PHYSICS
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- Will the focal length of a lens change when it is submerged in water? Explain.arrow_forwardCan an image be larger than the object even though its magnification is negative? Explain.arrow_forwardSuppose an object has thickness dp so that it extends from object distance p to p + dp. (a) Prove that the thickness dq of its image is given by (q2/p2)dp. (b) The longitudinal magnification of the object is Mlong = dq/dp. How is the longitudinal magnification related to the lateral magnification M?arrow_forward
- A 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_forwardIn Example 25.7, the magnification of a book held 7.50 cm from a 10.0 cm focal length lens was found to be 3.00. (a) Find the magnification for the book when it is held 8.50 cm from the magnifier. (b) Do the same for when it is held 9.50 cm from the magnifier. (c) Comment on the trend in m as the object distance increases as in these two calculations.arrow_forwardTwo lenses made of kinds of glass having different indices of refraction n1 and n2 are cemented together to form an optical doublet. Optical doublets are often used to correct chromatic aberrations in optical devices. The first lens of a certain doublet has index of refraction n1, one flat side, and one concave side with a radius of curvature of magnitude R. The second lens has index of refraction n2 and two convex sides with radii of curvature also of magnitude R. Show that the doublet can be modeled as a single thin lens with a focal length described by 1f=2n2n11Rarrow_forward
- Asaparrow_forward-give 3 optical instruments (example camera, microscope). -count/give the number of lenses used in EACH particular instrument and Identify whether the lens is converging or diverging.arrow_forward•• (a) An object that is 3.00 cm high is placed 25.0 cm in front of a thin lens that has a power equal to 10.0 D. Draw a ray di- agram to find the position and the size of the image and check your results using the thin-lens equation. (b) Repeat Part (a) if the object is placed 20.0 cm in front of the lens. (c) Repeat Part (a) for an object placed 20.0 cm in front of a thin lens that has a power equal to -10.0 D. SSM 45arrow_forward
- A camera with a 50.0 mm focal length lens is being used to photograph a person standing 8.00 m away. • How far from the lens must the film be? Provide the solution: cmarrow_forward*68 In Fig. 34-44, a real inverted image I of an object O is formed by a particular lens (not shown); the object-image separation is d= 40.0 cm, measured along the central axis of the lens. The image is just half the size of the object. (a) What kind of lens must be used to produce this image? (b) How far from the object must the lens be placed? (c) What is the focal length of the lens? Lens here Axis Figure 34-44 Problem 68.arrow_forward9- EXAMPLE 23-15 A two-lens system. Two converging lenses, A and B, with focal lengths fA in Fig. 23-44a. An object is placed 60.0 cm in front of the first lens as shown in Fig. 23-44b. Determine (a) the position, and (b) the magnification, of the final image formed by the combination of the two lenses. = 20.0 cm and fs # 25.0 cm, are placed 80.0 cm apart, as shown Lens A Lens B FB FR (а) 80.0 cm FIGURE 23-44 Two lenses, A and B, used in combination. Example 23-15. The small numbers refer to the easily drawn rays. FA FB FAIA FR OB (= 1A) doB (b)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