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  4. A convex lens is made of 3 layers of glass of 3 different materials as in the figure. A point object is placed on its axis. The number of images of the object are

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Q. A convex lens is made of $3\,layers$ of glass of $3$ different materials as in the figure. A point object is placed on its axis. The number of images of the object arePhysics Question Image

KCETKCET 2008Ray Optics and Optical Instruments

Solution:

A lens made of three different materials as shown have only one focal length. Thus, for a given object there is only one image.
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