TB_chapter23 - Chapter 23 Mirrors and Lenses CHAPTER 23...

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Chapter 23, Mirrors and Lenses C HAPTER 23 Conceptual Questions C1. An eyeglass lens is cut with one surface having a radius R 1 and the other surface having a radius R 2 , with R 1 < R 2 . Both positive radii are measured from the same side with R 1 being the side closer to the eye. Is this convex-concave lens a converging lens or a diverging lens? a. This is a converging lens. b. This is a diverging lens. c. This can be either a converging or diverging lens, as more information is needed for a final determination. d. This is neither, since a lens cannot be made this way. C2. A concave mirror has radius R. When an object is located a distance 2R from the lens, which describes the image formed? a. real, inverted, diminished b. real, inverted, enlarged c. virtual, upright, diminished d. real, inverted, of equal size C3. A convex lens has a focal length of magnitude F. At which of the following distances from this lens would a real object give an inverted virtual image? a. ½ F b. 2F c. Any value greater than 2F. d. This cannot be done with a convex lens. C4. A real object is place a distance d from a converging lens. The object is then moved to a distance 2d from the converging lens. Which of the following statements is false? a. The image in the first case with the object at distance d can be the larger one. b. The image in the second case with the object at distance 2d can be the larger one. c. If both images are real, the image in the second case is smaller. d. If the image in the first case is real, the image in the second case is upright. C5. A real object is place to the left of a converging lens and an image forms. Then, to the right of the converging lens a diverging lens is placed. A real, inverted final image forms to the right of the diverging lens. Which of the following could give this result? a. An upright virtual image caused by the first lens forms between the two lenses. b. An inverted real image caused by the first lens forms between the two lenses. c. A real, upright image was formed by the first lens to the right of where the diverging lens is to be placed. d. A real, inverted image was formed by the first lens to the right of where the diverging lens is to be placed. 23.1 Flat Mirrors 139
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Chapter 23, Mirrors and Lenses 1. You stand two feet away from a plane mirror. How far is it from you to your image? a. 2.0 ft b. 3.0 ft c. 4.0 ft d. 5.0 ft 2. Which of the following best describes the image from a plane mirror? a. virtual and magnification greater than one b. real and magnification less than one c. virtual and magnification equal to one d. real and magnification equal to one 3. When the reflection of an object is seen in a plane mirror, the image is: a. real and upright.
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This note was uploaded on 01/06/2012 for the course PHYS 201 taught by Professor Coffin during the Spring '09 term at Oregon State.

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TB_chapter23 - Chapter 23 Mirrors and Lenses CHAPTER 23...

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