A thin positive lens is used to enlarge the image of a slide on a wall 10 m from the lens. If the slide is 20 x 30 mm², and the image occurs 2 x 3 m², what is the focal length from the lens and the distance from the slide to the lens
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Q: A lens of focal length 10.0 cm forms an image 11.0 cm from the lens. What was the object distance?
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6. A thin positive lens is used to enlarge the image of a slide on a wall 10 m from the lens. If the slide is 20 x 30 mm², and the image occurs 2 x 3 m², what is the focal length from the lens and the distance from the slide to the lens
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- 6. An object is 185 cm from a convex lens with a focal length of 25 cm. When an inverted image is 12 cm tall, how tall is the associated object? 7. What are the image height and orientation produced by the setup in the following figure? Object 5.0 cm – 10.0 cm - 15.0 cm15. An object is placed at a distance xo =-1.5f in front of a convex lens of focal length f located at x = 0. An identical object is placed at a distance x'o = -2f in front of a concave lens of focal length - f located at x' = 0. Find the difference between the two image positions (x' - Xi). Draw ray diagrams.3. Figure 2.2 is a photograph of an eyeball with the image of a boy in a doorway. Is the eye here acting as a lens or as a mirror? Explain. 6. A stamp collector uses a converging lens with focal length 28 cm to view a stamp 16 cm in front of the lens. (a)Where is the image located? (b) What is the magnification? Figure 2.1 Problem 2 Figure 2.2 Problem 3
- 7. Two 10.0 cm focal length lenses are placed 20.0 cm away from each other. An object sits 5.00 cm to the left of the first lens. Draw its final image. 8. Two 10.0 cm focal length lenses are placed 20.0 cm away from each other. An object sits 15.00 cm to the left of the first lens. Draw its final image.xxi1. How far from the object should the lens be held?
- 8. Given a biconvex lens made of glass of index 1.5. The magnitude of the radius of curvature is the same for both surfaces. The lens has a focal length of 75 mm. What focal length would the lens have if it had the same surface curvatures but an index of 3.0? Express in millimeters.1. 2. 3. What is the focal length of -4.50 D lens? Where is the focal point in the above lens and is it in front of or behind the lens? Would the image in the above lens be real or virtual?8. On one side of a converging lens of focal length 59.1 cm, you position an object of height 3.02 cm somewhere along the principal axis. The resultant image has a height of 15.10 cm. How far from the lens is the object located? 70.9 cm 28.4 cm 92.2 cm 42.5 cm
- A camera is equipped with a lens with a focal length of 27 cm. When an object 1.2 m (120 cm) away is being photographed, how far from the film should the lens be placed? cmThe distance from the lens of a particular eye to the retina is 1.96 cm. What is the focal length of the lens when the eye produces a clear image of an object 35.9 cm away? cm