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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Chapter 19, Problem 21P
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A forensic scientist is using a microscope with a 15× objective and a 5× eyepiece to examine a hair from a crime scene. How far from the objective is the hair? Assume a length L = 160 mm.
A forensic scientist examines a hair from a crime scene using a microscope with a 15x objective and a 5x eyepiece. How far is the hair from the goal? Assume L = 160 mm in length.
A pathologist inspects a sample of 7-μm-diameter human blood cells under a microscope. She selects a 40× objective and a 10× eyepiece. To give a senseof the magnification the microscope provides, compute the size of an object, viewed at a 25 cm distance, that would have the same apparent size as a blood cell seen through the microscope.
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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- 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_forwardThe 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_forwardA forensic scientist examines a hair with a microscope that has a 15x objective and a 5x eyepiece. The magnified hair has the same apparent size as a 2.0-cm-wide ribbon seen from a distance of 1.0 m. What is the diameter of the hair? Express your answer with the appropriate units. d= 0.27 HÅ mm ?arrow_forward
- In a compound microscope, the objective has a focal length of 1.0 cm, the eyepiece has a focal length of 2.0 cm, and the tube length is 25 cm. What is the magnitude of the overall magnification of the microscope?arrow_forwardA certain telescope has an objective of focal length 1 500 cm. If the Moon is used as an object, a 1.0-cm-long image formed by the objective corresponds to what distance, in miles, on the Moon? Assume 3.8 x 10 8 m for the Earth–Moon distance.arrow_forwardWhen two lenses are used in combination, the first one forms an image that then serves as the object for the second lens. The magnification of the combination is the ratio of the height of the final image to the height of the object. This is equal to the product of the separate magnification values mm of each lens. In equation form mtotal=(m1)(m2). A 1.20 cm tall object is 50.0 cm to the left of a lens of focal length of magnitude 40.0 cm . A second lens, this one having a focal length of magnitude 60.0 cm, is located 300 cm to the right of the first lens along the same optic axis. A) Find the location and height of the image (call it I2) formed by the lens with a focal length of 40.0 cm if the first lens is diverging and the second lens is a converging. B) I2 is now the object for the second lens. Find the location and height of the image produced by the second lens.arrow_forward
- A student with normal sight is surprised to see a possum scampering up the rear wall in the Lyle theatre. The possum is 30.0 cm long and the wall is 7.1 m away. The student's eyeballs have a diameter of 2.2 cm.How big is the image of the possum on the student's retina? (Units: cm)arrow_forwardA student with normal sight is surprised to see a possum scampering up the rear wall in the Lyle theatre. The possum is 30.0 cm long and the wall is 2.3 m away. The student's eyeballs have a diameter of 2.4 cm. How big is the image of the possum on the student's retina? (Units: cm)arrow_forwardThe power of the lenses of a certain physician’s eyes is 59 D. Assume the distance between a retina and a lens in the human eye is 2.00 cm. When she carefully examines a patient, how far, in meters, must the patient be from her?arrow_forward
- A wire mesh consists of squares each of side 1 mm. It is placed at a distance of 9.0 cm from a magnifying glass of focal length 10 cm. It is viewed by placing the eye close to the lens. (a) What is the magnification produced by the lens? (b) What is the area of each square in the virtual image of the mesh? (c) What is the magnifying power of the lens? (d) Is the magnification (a) equal to the magnifying power in (c)? If not, when can they be made equal to each other? Explain.arrow_forwardThe eye can be treated as a spherical optical surface filled with a fluid with an index of refraction of 1.34. An object with a height 9.50 cm is placed 44.5 cm from the front of the eye. A clear image forms on the retina at the back of the eye with an image height of -3.55 mm. What is the diameter of the eye? Give your answer in cm to 2 decimal places but do NOT include units with your answer.arrow_forwardThe accommodation limits for Nearsighted Nick's eyes are 20.0 cm and 78.0 cm. When he wears his glasses, he is able to see faraway objects clearly. At what minimum distance is he able to see objects clearly? cm=?arrow_forward
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