A convex lens of focal length F is placed in contact with a concave lens of focal length F . The equivalent focal length of the combination is:
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SOLVED: Use the :following known values for the combination of convex and concave lenses: Lens 1: A convex lens with focal length with fi = +20 cm Lens 2: A concave lens
![Concave and convex lenses, each has the same focal length \\[20\\text{ cm}\\] and they are put in contact to form a combination lens. This combination lens is used to view an object](https://www.vedantu.com/question-sets/fefc0fc6-7ab4-417b-80e6-3b03115e40ae7759432403841777576.png "Concave and convex lenses, each has the same focal length \\[20\\text{ cm}\\] and they are put in contact to form a combination lens. This combination lens is used to view an object")
Concave and convex lenses, each has the same focal length \\[20\\text{ cm}\\] and they are put in contact to form a combination lens. This combination lens is used to view an object
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A convex lens of focal length f1 is kept in contact with a concave lens of focal length f2. - Sarthaks eConnect | Largest Online Education Community
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