College Physics: A Strategic Approach (3rd Edition)
3rd Edition
ISBN: 9780321879721
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
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Textbook Question
Chapter 19, Problem 38GP
A magnifier is labeled “5×.” What would its magnification be if used by a person with a near-point distance of 50 cm?
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Chapter 19 Solutions
College Physics: A Strategic Approach (3rd Edition)
Ch. 19 - On a sunny summer day, with the sun overhead, you...Ch. 19 - Suppose you have two pinhole cameras. The first...Ch. 19 - A photographer focuses his camera on his subject....Ch. 19 - The object for a magnifier is usually placed very...Ch. 19 - A nature photographer taking a close-up shot of an...Ch. 19 - The CCD detector in a certain camera has a width...Ch. 19 - All humans have what is known as a blind spot,...Ch. 19 - Suppose you wanted special glasses designed to...Ch. 19 - You have lenses with the following focal lengths:...Ch. 19 - An 8-year-old child and a 75-year-old man both use...
Ch. 19 - A friend lends you the eyepiece of his microscope...Ch. 19 - An astronomer is using a telescope to observe two...Ch. 19 - A student makes a microscope using an objective...Ch. 19 - Is the wearer of the glasses in Figure Q19.14...Ch. 19 - Prob. 15CQCh. 19 - A collector notices a rare beetle on a tree 1.0 m...Ch. 19 - A microscope has a tube length of 20 cm. What...Ch. 19 - The distance between the objective and eyepiece of...Ch. 19 - A nearsighted person has a near point of 20 cm and...Ch. 19 - A nearsighted person has a near point of 20 cm and...Ch. 19 - A 60-year-old man has a near point of 100 cm,...Ch. 19 - A person looking through a 10 D lens sees an image...Ch. 19 - Prob. 23MCQCh. 19 - An amateur astronomer looks at the moon through a...Ch. 19 - Prob. 1PCh. 19 - A student has built a 20-cm-long pinhole camera...Ch. 19 - A pinhole camera is made from an 80-cm-long box...Ch. 19 - A photographer uses his camera, whose lens has a...Ch. 19 - An older camera has a lens with a focal length of...Ch. 19 - In Figure P19.6 the camera lens has a 50 mm focal...Ch. 19 - a. Estimate the diameter of your eyeball. b. Bring...Ch. 19 - A farsighted person has a near point of 50 cm...Ch. 19 - A nearsighted woman has a far point of 300 cm....Ch. 19 - Martin has severe myopia, with a far point of only...Ch. 19 - Mary, like many older people, has lost all ability...Ch. 19 - Prob. 12PCh. 19 - Prob. 13PCh. 19 - Rank the following people from the most...Ch. 19 - The diameter of a penny is 19 mm. How far from...Ch. 19 - A magnifier has a magnification of 4 for someone...Ch. 19 - A magnifier has a magnification of 5. How far from...Ch. 19 - A farsighted man has a near point of 40 cm. What...Ch. 19 - An inexpensive microscope has a tube length of...Ch. 19 - A standard biological microscope is required to...Ch. 19 - A forensic scientist is using a standard...Ch. 19 - A microscope with an 8.0-mm-focal-length objective...Ch. 19 - The distance between the objective and eyepiece...Ch. 19 - For the combination of two identical lenses shown...Ch. 19 - For the combination of two lenses shown in Figure...Ch. 19 - A researcher is trying to shoot a tranquilizer...Ch. 19 - The objective lens of the refracting telescope at...Ch. 19 - You use your 8 binoculars to focus on a...Ch. 19 - Your telescope has a 700-mm-focal-length objective...Ch. 19 - A narrow beam of light with wavelengths from 450...Ch. 19 - Prob. 31PCh. 19 - A ray of red light, for which n = 1.54, and a ray...Ch. 19 - Two lightbulbs are 1.0 m apart. From what distance...Ch. 19 - A 1.0-cm-diameter microscope objective has a focal...Ch. 19 - A microscope with an objective of focal length 1.6...Ch. 19 - Suppose you point a pinhole camera at a 15-m-tall...Ch. 19 - Jason uses a lens with a focal length of 10.0 cm...Ch. 19 - A magnifier is labeled 5. What would its...Ch. 19 - A 20 microscope objective is designed for use in...Ch. 19 - Two converging lenses with focal lengths of 40 cm...Ch. 19 - A converging lens with a focal length of 40 cm and...Ch. 19 - A lens with a focal length of 25 cm is placed 40...Ch. 19 - A microscope with a 5 objective lens images a...Ch. 19 - Prob. 44GPCh. 19 - A 20 objective and 10 eyepiece give an angular...Ch. 19 - The objective lens and the eyepiece lens of a...Ch. 19 - Your telescope has an objective lens with a focal...Ch. 19 - Martha is viewing a distant mountain with a...Ch. 19 - Susan is quite nearsighted; without her glasses,...Ch. 19 - A spy satellite uses a telescope with a...Ch. 19 - Two stars have an angular separation of 3.3 105...Ch. 19 - Frank is nearsighted and his glasses require a...Ch. 19 - What is the angular resolution of the Hubble Space...Ch. 19 - The Hubble Space Telescope has a mirror diameter...Ch. 19 - Once dark adapted, the pupil of your eye is...Ch. 19 - The normal human eye has maximum visual acuity...Ch. 19 - Prob. 57GPCh. 19 - Light that enters your eyes is focused to form an...Ch. 19 - Light that enters your eyes is focused to form an...Ch. 19 - Light that enters your eyes is focused to form an...Ch. 19 - Light that enters your eyes is focused to form an...
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- Two stars that are 109km apart are viewed by a telescope and found to be separated by an angle of 105 radians. If the eyepiece of the telescope has a focal length of 1.5 cm and the objective has a focal length of 3 meters, how far away are the stars from the observer?arrow_forwardWhat is the magnification of a magnifying lens with a focal length of 10 cm if it is held 3.0 cm from the eye and the object is 12 cm from the eye?arrow_forwardWhat 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_forward
- A nearsighted man cannot see objects clearly beyond 20 cm from his eyes. How close must he stand to a mirror in order to see what he is doing when he shaves?arrow_forwardTwo 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 answersarrow_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_forward
- Show 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_forwardIn Figures CQ36.11a and CQ36.11b, which glasses correct nearsightedness and which correct farsightedness?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_forward
- A 7.5x 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?arrow_forwardWhat will be the angular magnification of a convex lens with the focal length 2.5 cm?arrow_forwardWhere 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?arrow_forward
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