College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
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Chapter 25, Problem 27CQ
Devise an arrangement of mirrors allowing you to see the back of your head. What is the minimum number of mirrors needed for this task?
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Devise an arrangement of mirrors allowing you to see the back of your head. What is the minimum number of mirrors needed for this task?
A mirror is designed so that a person 50 cm in front of it sees an erect image magnified by a factor of three. A) What is the radius of curvature of the mirror? B) Is the mirror concave or convex?
Find the focal length of the mirror.
Chapter 25 Solutions
College Physics
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Ch. 25 - A high-quality diamond may be quite clear and...Ch. 25 - Is it possible that total internal reflection...Ch. 25 - The most common type at mirage is an illusion that...Ch. 25 - It can he argued that a flat piece of glass, such...Ch. 25 - You can often see a reflection when looking at a...Ch. 25 - When you focus a camera, you adjust the distance...Ch. 25 - A thin lens has two focal points, one on either...Ch. 25 - Will the focal length of a lens change when it is...Ch. 25 - What are the differences between teal and virtual...Ch. 25 - Can you see a virtual image? Can you photograph...Ch. 25 - Is it necessary to project a real image onto a...Ch. 25 - At what distance is an image always locatedat do,...Ch. 25 - Under what circumstances will an image be located...Ch. 25 - What is meant by a negative magnification? What is...Ch. 25 - Can a case 1 image be larger than the object even...Ch. 25 - Figure 25.49 shows a light bulb between two...Ch. 25 - Devise an arrangement of mirrors allowing you to...Ch. 25 - If you wish to see your entire body in a flat...Ch. 25 - It can be argued than a flat mirror has an in?nite...Ch. 25 - Why are diverging mirrors often used for rear-view...Ch. 25 - Suppose a man stands in front of a mirror as shown...Ch. 25 - Show that when light reflects from two mirrors...Ch. 25 - Light shows staged with lasers use moving mirrors...Ch. 25 - A flat minor is neither converging nor diverging....Ch. 25 - What is the speed of light in water? In glycerine?Ch. 25 - What is the speed of light in air? In crown glass?Ch. 25 - Calculate the index of refraction for a medium in...Ch. 25 - In what substance in Table 25.1 is the speed of...Ch. 25 - There was a major collision of an asteroid with...Ch. 25 - A scuba diver training in a pool looks at his...Ch. 25 - Components of some computers communicate with each...Ch. 25 - (a) Using information in Figure 25.53, find the...Ch. 25 - Suppose you have an unknown clear substance...Ch. 25 - On the Moon’s surface, lunar astronauts placed a...Ch. 25 - Suppose Figure 25.54 represents a ray of light...Ch. 25 - Figure 25.54 shows a ray of light passing from one...Ch. 25 - Unreasonable Results Suppose light travels from...Ch. 25 - Construct Your Own Problem Consider sunlight...Ch. 25 - Unreasonable Results Light traveling from water to...Ch. 25 - Verify that the critical angle for light going...Ch. 25 - (a) At the end of Example 25.4, it was stated that...Ch. 25 - An optical fiber uses flint glass clad with crown...Ch. 25 - At what minimum angle will you get total internal...Ch. 25 - Suppose you are using total internal reflection to...Ch. 25 - You can determine me index of refraction of a...Ch. 25 - A ray of light, emitted beneath the surface of an...Ch. 25 - A light ray entering an optical fiber surrounded...Ch. 25 - (a) What is me ratio of the speed of red light to...Ch. 25 - A beam of white light goes from air into water at...Ch. 25 - By how much do the critical angles for red (660...Ch. 25 - (a) A narrow beam of light containing yellow (580...Ch. 25 - A parallel beam of light containing orange (610...Ch. 25 - A ray of 610 nm light goes from air into fused...Ch. 25 - A narrow beam of light containing red (660 nm) and...Ch. 25 - A narrow beam of white light enters a prism made...Ch. 25 - What is the power in diopters at a camera lens...Ch. 25 - Your camera's zoom lens has an adjustable focal...Ch. 25 - What is the focal length of 1.75 D reading glasses...Ch. 25 - You note that your prescription for new eyeglasses...Ch. 25 - How far from the lens must the film in a camera...Ch. 25 - A certain slide projector has a 100 mm focal...Ch. 25 - A doctor examines a mole with a 15.0 cm focal...Ch. 25 - How far from a piece of paper must you hold your...Ch. 25 - A camera with a 50.0 mm focal length lens is being...Ch. 25 - A camera lens used for taking close-up photographs...Ch. 25 - Suppose your 50.00 mm local length camera lens is...Ch. 25 - (a) What is the focal length of a magnifying glass...Ch. 25 - What magnification will be produced by a lens of...Ch. 25 - In Example 25.7, the magnification of a book held...Ch. 25 - Suppose a 200 mm focal length telephoto lens is...Ch. 25 - A camera with a 100 mm focal length lens is used...Ch. 25 - Combine thin lens equations to show that the...Ch. 25 - What is the focal length of a makeup mirror that...Ch. 25 - Some telephoto cameras use a mirror rather than a...Ch. 25 - (a) Calculate the focal length of the mirror...Ch. 25 - Find the magnification of the heater element in...Ch. 25 - What is the focal length of a makeup mirror that...Ch. 25 - A shopper standing 3.00 m from a convex security...Ch. 25 - An object 1.50 cm high is held 3.00 cm from a...Ch. 25 - Ray tracing for a flat mirror shows that the image...Ch. 25 - Show that for a flat mirror hi= ho, knowing that...Ch. 25 - Use the law of reflection to prove that the focal...Ch. 25 - Referring to the electric room heater considered...Ch. 25 - Consider a 250-W heat lamp fixed to the ceiling in...
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- A small convex mirror and a large concave mirror are separated by 1.00 m, and an object is placed 1.40 m to the left of the concave mirror (Fig. P37.69). The concave mirror forms an image of this object at distance di = 25.0 cm. This image is then reflected in the convex mirror, which forms an image a distance of 8.00 cm behind the convex mirror. What is the focal length of the small convex mirror? FIGURE P37.69arrow_forwardYou are standing 2.5 m from a convex security mirror in a store. You estimate the height of your image to be half of your actual height. Estimate the radius of curvature of the mirror. Follow the sign conventions. Express your answer to one significant figure and include the appropriate units.arrow_forwardA full-length mirror is one in which you can see all of yourself. It need not be as big as you, and its size is independent of your distance from it. What is the smallest mirror on the wall in which this man can see his full image if his height is h=D1.70 m? 0.90 m O 1.70 m O 0.42 m O 0.85 marrow_forward
- The tallest basketball players have been approximately 2.29m tall (7 foot 6 inches). Approximately how tall a mirror must the player purchase so that he can see his face and feet at the same time? Assume the mirror can mounted anywhere on the wall. Group of answer choices 1.15m 2.3m 0.6m 1.5marrow_forwardYou are looking for a mirror that will enable you to see a 3.2-times magnified virtual image of an object that is placed 4.7 cm from the mirror’s vertex. part a) What kind of mirror will you need? which is the answer: Plane, Concave or Convex? Part (b) What should the mirror’s radius of curvature be, in centimeters? R=?arrow_forwardAn image formed by a convex mirror has a size h' = +5 cm. knowing that the object has a height h > 0, which of the following statements is true? O The image is real and h' = -h. %3D O The image is virtual and h' h. O The image is virtual and h' > h.arrow_forward
- An image formed by a concave mirror has a size h' = +5 cm. knowing that the object has a height h > 0, which of the following statements is true? O The image is virtual and h' > h. The image is real and h' > h. O The image is virtual and h' = h. O The image is virtual and h' < h. The image is real and h' = -h.arrow_forwardcem 1 1 of 1 Use this information for parts G, H and I. The sideview mirror on your car is convex. When looking in this mirror, you see a car that has an actual distance of 100 m behind you (the distance from the car to the mirror) and the image appears to be only -1.961 m from the mirror. Part G What is the focal length of this mirror? Answer in units of m to four significant figures. Do not Include the units symbol. Submit Request Answer Part H If the image of the car appears to be 2.941×10¬2 m tall, what is the height of the actual car? Answer in units of m to four significant figures. Do not include the units symbol. ? Submit Request Answer Part Iarrow_forwardI need helparrow_forward
- You are standing 1.5 m from a convex security mirror in a store. You estimate the height of your image to be half of your actual height. Estimate the radius of curvature of the mirror. Follow the sign conventions.arrow_forwardChapter 34, Problem 007 A concave shaving mirror has a radius of curvature of +35.2 cm. It is positioned so that the (upright) image of a man's face is 2.29 times the size of the face. How far is the mirror from the face? Number Units Use correct number of significant digits; the tolerance is +/-2%arrow_forwardA spherical concave mirror has a radius of curvature of +62 cm. What is the focal length of the mirror?arrow_forward
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