Physics (5th Edition)
5th Edition
ISBN: 9780321976444
Author: James S. Walker
Publisher: PEARSON
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Textbook Question
Chapter 27, Problem 76PCE
Galileo’s Telescope Galileo’s first telescope used a convex objective lens and a concave eyepiece, as shown in Figure 27-29. When this telescope is focused on an infinitely distant object, it produces an infinitely distant image (a) What is the focal length of the eyepiece of a Galilean telescope that has an objective focal length of 1.25 m and a magnification of +4.00? (b) How far apart are the two lenses?
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Physics (5th Edition)
Ch. 27.1 - If the f -number on a camera is increased does the...Ch. 27.2 - Prob. 2EYUCh. 27.3 - A magnifying glass is held over a ruled piece of...Ch. 27.4 - Rank the following microscopes in order of...Ch. 27.5 - In a typical telescope, is foppose greater than,...Ch. 27.6 - One advantage of reflecting telescopes over...Ch. 27 - Prob. 1CQCh. 27 - Prob. 2CQCh. 27 - If your near-point distance is N, how close can...Ch. 27 - When you open your eyes underwater, everything...
Ch. 27 - When you use a simple magnifying glass, does it...Ch. 27 - Does chromatic aberration occur in mirrors?...Ch. 27 - BIO Predict/Explain Octopus Eyes To focus its...Ch. 27 - Your friend is 1.7 m tall. (a) When she stands 3.2...Ch. 27 - Which forms the larger image on the retina of your...Ch. 27 - Approximating the eye as a single thin lens 2.70...Ch. 27 - Approximating the eye as a single thin lens 2.70...Ch. 27 - Find the far-point distance of a person whose...Ch. 27 - Four camera lenses have the following focal...Ch. 27 - BIO The focal length of the human eye is...Ch. 27 - Predict/Calculate A camera with a...Ch. 27 - The actual light sensor size of a digital camera...Ch. 27 - (a) Find the f -number of a telescope with an...Ch. 27 - You are taking a photo of a poster on the wall of...Ch. 27 - You are taking pictures of the beach at sunset...Ch. 27 - Predict/Calculate You are taking a photograph of a...Ch. 27 - The Hale Telescope The 200-in. (5.08-m) diameter...Ch. 27 - Predict/Explain Two professors are stranded on a...Ch. 27 - A clerk at the local grocery store wears glasses...Ch. 27 - The umpire at a baseball game wears glasses that...Ch. 27 - A police detective discovers eyeglasses with a...Ch. 27 - BIO The cornea of a normal human eye has an...Ch. 27 - A myopic student is shaving without his glasses....Ch. 27 - An eyeglass prescription calls for a lens with an...Ch. 27 - An optometrist prescribes contact lenses with a...Ch. 27 - Two thin lenses, with f1 = +25.0 cm and f2 = 42.5...Ch. 27 - Two concave lenses, each with f = 15 cm, are...Ch. 27 - BIO Predict/Calculate The focal length of a...Ch. 27 - BIO Predict/Calculate Diopter Change in Diving...Ch. 27 - A converging lens of focal length 9,000 cm is 18.0...Ch. 27 - Repeat Problem 28, this time with the coin placed...Ch. 27 - Find the focal length of contact lenses that would...Ch. 27 - Find the focal length of contact lenses that would...Ch. 27 - What focal length should a pair of contact lenses...Ch. 27 - Reading glasses with a power of + 1.50 diopters...Ch. 27 - A nearsighted person wears contacts with a focal...Ch. 27 - Without his glasses, Isaac can see objects clearly...Ch. 27 - A person whose near-point distance is 42.5 cm...Ch. 27 - A pair of eyeglasses is designed to allow a person...Ch. 27 - Predict/Calculate Your favorite aunt can read a...Ch. 27 - Predict/Calculate The relaxed eyes of a patient...Ch. 27 - Without glasses, your Uncle Albert can see things...Ch. 27 - A 2.05-cm-tall object is placed 30.0 cm to the...Ch. 27 - A simple camera telephoto lens consists of two...Ch. 27 - Predict/Calculate With unaided vision, a librarian...Ch. 27 - A persons prescription for her new bifocal glasses...Ch. 27 - A persons prescription for his new bifocal...Ch. 27 - Two lenses, with f1 = +20.0 cm and f2 = +30.0 cm,...Ch. 27 - A converging lens with a focal length of 4.0 cm is...Ch. 27 - Two magnifying glasses are for sale at a store....Ch. 27 - The Moon is 3476 km in diameter and orbits the...Ch. 27 - A magnifying glass is a single convex lens with a...Ch. 27 - Calculate the focal length of a magnifying lens...Ch. 27 - Predict/Calculate A student has two lenses, one of...Ch. 27 - A beetle 4.93 mm long is examined with a simple...Ch. 27 - To engrave wishes of good luck on a watch, an...Ch. 27 - A jeweler examines a diamond with a magnifying...Ch. 27 - In Problem 55, find the angular magnification when...Ch. 27 - Prob. 57PCECh. 27 - You have two lenses: lens 1 with a focal length of...Ch. 27 - Predict/Calculate Microscope objective A is...Ch. 27 - A compound microscope has an objective lens with a...Ch. 27 - BIO A typical red blood cell subtends an angle of...Ch. 27 - (a) If you treat a 10x eyepiece of a microscope as...Ch. 27 - The medium-power objective lens in a laboratory...Ch. 27 - A compound microscope has the objective and...Ch. 27 - The barrel of a compound microscope is 15 cm in...Ch. 27 - A compound microscope uses a 75.0-mm lens as the...Ch. 27 - The tube length of a microscope is defined to be...Ch. 27 - Two telescopes of different lengths produce the...Ch. 27 - A grade school student plans to build a 35-power...Ch. 27 - A 75-power refracting telescope has an eyepiece...Ch. 27 - An amateur astronomer wants to build a small...Ch. 27 - A pirate sights a distant ship with a spyglass...Ch. 27 - A telescope has lenses with focal lengths f1 =...Ch. 27 - Jason has a 25-power telescope whose objective...Ch. 27 - Roughing It with Science A professor shipwrecked...Ch. 27 - Galileos Telescope Galileos first telescope used a...Ch. 27 - The Moon has an angular size of 0 50 when viewed...Ch. 27 - A telescope is 275 mm long and has an objective...Ch. 27 - The focal length for light that strikes near the...Ch. 27 - The focal length for red light that strikes a...Ch. 27 - BIO Predict/Explain Intracorneal Ring An...Ch. 27 - CE BIO The lens in a normal human eye, with...Ch. 27 - CE BIO Predict/Explain Treating Cataracts When the...Ch. 27 - Galileos original telescope (Figure 27-29) used a...Ch. 27 - Predict/Calculate For each of the following cases,...Ch. 27 - Predict/Calculate You have two lenses, with focal...Ch. 27 - BIO The eye is actually a multiple-lens system,...Ch. 27 - BIO Fitting Contact Lenses with a Keratometer When...Ch. 27 - Pricey Stamp A rare 1918 Jenny stamp, depicting a...Ch. 27 - Prob. 90GPCh. 27 - Consider a Galilean telescope, as illustrated in...Ch. 27 - A farsighted person uses glasses with a refractive...Ch. 27 - Landing on an Aircraft Carrier The Fresnel Lens...Ch. 27 - A Cassegrain astronomical telescope uses two...Ch. 27 - Predict/Calculate A convex Ions (f = 20.0 cm) is...Ch. 27 - The diameter of a collimated laser beam can be...Ch. 27 - Consider three lenses with focal lengths of 25.0...Ch. 27 - Because a concave lens cannot form a real image of...Ch. 27 - A person with a near-point distance N uses a...Ch. 27 - Prob. 100GPCh. 27 - Prob. 101PPCh. 27 - Prob. 102PPCh. 27 - Prob. 103PPCh. 27 - Predict/Calculate Referring to Example 27-4...Ch. 27 - Predict/Calculate Referring to Example 27-4 in...Ch. 27 - Predict/Calculate Referring to Example 27-4 In...Ch. 27 - Predict/Calculate Referring to Example 27-6...Ch. 27 - Predict/Calculate Referring to Example 27-6...
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- Construct Your Own Problem Consider a telescope of the type used by Galileo, having a convex objective and a concave eyepiece as illustrated in part (a) of Figure 2.40. Construct a problem in which you calculate the location and size of the image produced. Among the things to be considered are the focal lengths of the lenses and their relative placements as well as the size and location of the object. Verify that the angular magnification is greater than one. That is, the angle subtended at the eye by the image is greater than the angle subtended by the object.arrow_forwardUnreasonable 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_forwardConstruct Your Own Problem Consider a telescope of the type used by Galileo, having a convex objective and a concave eyepiece as Illustrated in Figure 26.23(a). Construct a problem in which you calculate the location and size of the image produced. Among the things to be considered are the focal lengths of the lenses and their relative placements as well as the size and location of the object. Verity that the angular magnification is greater than one. That is, the angle subtended at the eye by the image is greater than the angle subtended by the object.arrow_forward
- A microscope has an objective lens with a focal length of 16.22 mm and an eyepiece with a focal length of 9.50 mm. With the length of the barrel set at 29.0 cm, the diameter of a red blood cells image subtends an angle of 1.43 mrad with the eye. It the final image distance is 29.0 cm from the eyepiece, what is the actual diameter of the red blood cell? Hint: To solve this question, go back to basics and use the thin-lens equation.arrow_forwardTwo campers wish to start a fire during the day. One camper is nearsighted and one is farsighted. Whose glasses should be used to focus the Suns rays onto some paper to start the fire? (a) either campers (b) the nearsighted campers (c) the farsighted campersarrow_forwardTo fit a contact lens to a patient's eye, a keratometer can be used to measure the curvature of the corneathe front surface of the eye. This instrument places an illuminated object of known .size at a known distance p from the cornea, which then reflects some light from the object, forming an image of it The magnification M of the image is measured by using a small viewing telescope that allows a comparison of the image formed by the cornea with a second calibrated image projected into the field of view by a prism arrangement. Determine the radius of curvature of the cornea when p = 30.0 cm and M = 0.013 0.arrow_forward
- 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?arrow_forwardTo fit a contact lens to a patient's eye, a keratometer can be used to measure the curvature of the corneathe front surface of the eye. This instrument places an illuminated object of known .size at a known distance p from the cornea, which then reflects some light from the object, forming an image of it The magnification M of the image is measured by using a small viewing telescope that allows a comparison of the image formed by the cornea with a second calibrated image projected into the field of view by a prism arrangement. Determine the radius of curvature of the cornea when p = 30.0 cm and M = 0.013 0.arrow_forwardUnreasonable Results Your friends show you an image 1hrough 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 laugh. The resulting overall magnification is 250,000. Are 1hese viable values for a microscope?arrow_forward
- Objects viewed through a microscope are placed very close to the focal point of the objective lens. Show that the minimum separation x of two objects resolvable through the microscope is given by x=1.22f0D , where f0is the focal length and D is the diameter of the objective lens as shown below.arrow_forwardA magnifying glass produces an angular magnification of 4.5 when used by a young person with a near point of 18 cm. What is the maximum angular magnification obtained by an older person with a near point of 45 cm?arrow_forwardThe image produced by the microscope in Figure 25.16 cannot be projected. Could extra lenses or mirrors project if? Explain.arrow_forward
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