ism_chapter_32 - 929 Chapter 32 Optical Images Conceptual...

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Unformatted text preview: 929 Chapter 32 Optical Images Conceptual Problems 1 Determine the Concept Yes. Note that a virtual image is seen because the eye focuses the diverging rays to form a real image on the retina. Similarly, the camera lens can focus the diverging rays onto the film. 2 Determine the Concept Yes; the mirror image is a left-handed coordinate system. 3 ( a ) False. The virtual image formed by a concave mirror when the object is between the focal point and the vertex of the mirror depends on the distance of the object from the vertex. ( b ) False. When the object is outside the focal point, the image is real. ( c ) True. ( d ) False. When the object is between the center of curvature and the focal point, the image is enlarged and real. *4 Determine the Concept Let s be the object distance and f the focal length of the mirror. ( a ) If s < f , the image is virtual, upright, and larger than the object. ( b ) If s < f , the image is virtual, upright, and larger than the object. ( c ) If s > 2 f , the image is real, inverted, and smaller than the object. ( d ) If f < s < 2 f , the image is real, inverted, and larger than the object. 5 Determine the Concept A convex mirror always produces a virtual, upright image that is s than the object. It never produces an enlarged image. Chapter 32 930 6 Determine the Concept They appear more distant because the images are smaller than they would be in a flat mirror. 7 Picture the Problem The ray diagram shows three object positions 1, 2, and 3 as the object is moved from a great distance toward the focal point F of a concave mirror. The real images corresponding to each of these object positions are labeled with the same numeral. correct. is ) ( b 8 Picture the Problem The diagram shows two rays (from the bundle of rays) of light refracted at the air-water interface. Because the index of refraction of water is greater than that of air, the rays are bent toward the normal. The diver will, therefore, think that the rays are diverging from a point above the bird and so the bird appears to be farther from the surface than it actually is. *9 Determine the Concept ( a ) The lens will be positive if its index of refraction is greater than that of the surrounding medium and the lens is thicker in the middle than at the edges. Conversely, if the index of refraction of the lens is less than that of the surrounding medium, the lens will be positive if it is thinner at its center than at the edges. ( b ) The lens will be negative if its index of refraction is greater than that of the surrounding medium and the lens is thinner at the center than at the edges. Conversely, if the index of refraction of the lens is less than that of the surrounding medium, the lens will be negative if it is thicker at the center than at the edges. Optical Images 931 10 Determine the Concept The focal length depends on the index of refraction, and n is a function of wavelength....
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This homework help was uploaded on 02/26/2008 for the course PHYSICS 11 taught by Professor Licini during the Spring '07 term at Lehigh University .

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ism_chapter_32 - 929 Chapter 32 Optical Images Conceptual...

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