A 1.4-cm-tall object is 54 cm in front of a lens that has a -27 cm focal length. diverging
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- A point source of light is placed a distance of 3f from a converging lens, where f is the focal lengthof the lens. Does this make a real or virtual image?a) real imageb) virtual imagec) no image is producedd) need more information to tell4.To measure the focal length of a diverging lens, a converging lens is placed in contact with it as shown to the right. The sun's focused by this Image point made by first lens (object point for second lens) are rays combination at a point 28.5 cm behind Image made by second lens the lenses. If the converging lens has a focal length fc of 16 cm, what is the focal length of the diverging lens? (final image) fc -fr =28.5 cmA plano-concave lens for an underwater camera is shown below. It's diopter under water is -8.33. The radius of curvature of its front surface is 8 cm. Assuming that the index of fraction ofwater is 1.33, what is the index of fraction of the substance of which this lens it is made? a. 2.00 b. 1.81 c. 1.52 d. 1.67
- A camera is equipped with a lens with a focal length of 30 cm When an object 200 cm away is being photographed, how far from the ?9?lm should the lens be placed?CHAPTER 23 A diverging lens has a focal length of magnitude 22.6 cm. D.) Find the magnification for the object at a distance: 45.2 22.6 11.36. A 2.0 cm tall object is 15 cm in front of a converging lens that has a 20 cm focal length. (a) Use ray tracing to find the position and height of the image. To do this accu- rately, use a ruler or a paper with a grid. Determine the image distance and image height by making measurements on your diagram. (b) Calculate the image position and height. Compare with your ray-tracing an- swers in part a.