Done Optics_test.pdf 2 of 4 riant 6 1. Suppose the book page is held 8.50 cm from a convex lens of focal length 12.0 cm, such as a typical magnifying glass might have. (a) Using the thin lens equations to calculate the location of the image. (b) What magnification is produced? (c) Use ray tracing to get an approximate location for the image. 2. (a) What is the power of the eye when it is focused to view objects located at far point po=c0? (b) Calculate the power and the focal length of the eye when it is focused to view objects located at near point po=25? (c) Find range of accommodation AF. (d) If you can accommodate at a maximum rate of 1.1 dioptres per second, how long does it take your eyes to adjust between far object and close objects? 3. A person with refractive myopia can see objects as close as 25 cm clearly, and objects as far away as 3 m clearly. (a) What is the maximum optical power of this person's eye? (b) What is the minimum optical power of this person's eye? (c) What is the range of accommodation of this person's eye? Variant 7 1. Suppose an object such as a book page is held 7 cm from a concave lens of focal length -13.0 cm. Such

Done Optics_test.pdf 2 of 4 riant 6 1. Suppose the book page is held 8.50 cm from a convex lens of focal length 12.0 cm, such as a typical magnifying glass might have. (a) Using the thin lens equations to calculate the location of the image. (b) What magnification is produced? (c) Use ray tracing to get an approximate location for the image. 2. (a) What is the power of the eye when it is focused to view objects located at far point po=c0? (b) Calculate the power and the focal length of the eye when it is focused to view objects located at near point po=25? (c) Find range of accommodation AF. (d) If you can accommodate at a maximum rate of 1.1 dioptres per second, how long does it take your eyes to adjust between far object and close objects? 3. A person with refractive myopia can see objects as close as 25 cm clearly, and objects as far away as 3 m clearly. (a) What is the maximum optical power of this person's eye? (b) What is the minimum optical power of this person's eye? (c) What is the range of accommodation of this person's eye? Variant 7 1. Suppose an object such as a book page is held 7 cm from a concave lens of focal length -13.0 cm. Such

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter26: Image Formation By Mirrors And Lenses

Section: Chapter Questions

Problem 10OQ

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Two thin lenses of focal lengths f1 = 15.0 and f2 = 10.0 cm, respectively, are separated by 35.0 cm along a common axis. The f1 lens is located to the left of the f2 lens. An object is now placed 50.0 cm to the left of the f1 lens, and a final image due to light passing though both lenses forms. By what factor is the final image different in size from the object? (a) 0.600 (b) 1.20 (c) 2.40 (d) 3.60 (e) none of those answers
The accommodation limits for a nearsighted persons eyes are 18.0 cm and 80.0 cm. When he wears his glasses, he can see faraway objects clearly. At what minimum distance is he able to see objects clearly?
A small telescope has a concave mirror with a 2.00-rn radius of curvature for its objective. Its eyepiece is a 4.00 cm-focal length lens. (a) What is the telescope’s angular magnification? (b) What angle is subtended by a 25,000 km-diameter sunspot? (c) What is the angle of its telescopic image?
. (a) In a camera equipped with a 50-mm focal-length lens, the maximum distance that the lens can be from the film is 60 mm. What is the smallest distance an object can be from the camera if its image on the film is to be in focus? What is the magnification? (b) An extension tube is added between the lens and the camera body so that the lens can be positioned 100 mm from film. How close can the object be now? What is the magnification?
A 7.5 binocular produces an angular magnification of —7.50, acting like a telescope. (Mirrors are used to make the image upright.) If the binoculars have objective lenses with a 75.0-cm focal length, what is the focal length of the eyepiece lenses?
Let objective and eyepiece of a compound microscope have focal lengths of 2.5 cm and 10 cm, respectively and be separated by 12 cm. A 70- mobject is placed 6.0 cm from the objective. How large is the virtual image formed by the objective-eyepiece system?
An amoeba is 0.305 cm away from the 0.300 cm- focal length objective lens of a microscope. (a) Where is the image formed by the objective lens? (b) What is this image’s magnification? (C) An eyepiece with a 2.00-cm focal length is placed 20.0 cm from the objective. Where is the final image? (d) What angular magnification is produced by the eyepiece? (e) What is the overall magnification? (See Figure 2.39.)
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?
A converging lens has a focal length of 20.0 cm. Locate the image for object distances of (a) 40.0 cm, (b) 20.0 cm, and (c) 10.0 cm. For each case, state whether the image is real or virtual and upright or inverted. Find the magnification in each case.
A 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 answers
Where does an object need to be placed relative to a microscope for its 0.50 cm-focal length objective to produce a magnification of —400?
Give three advantages that the Fresnel lens design has over that of a conventional lens with the same size and focal length.