![A convex lens of power 4D is kept in contact with a concave lens of power 3D, the effective powe... - YouTube A convex lens of power 4D is kept in contact with a concave lens of power 3D, the effective powe... - YouTube](https://i.ytimg.com/vi/1nqWWz9UXB0/maxresdefault.jpg)
A convex lens of power 4D is kept in contact with a concave lens of power 3D, the effective powe... - YouTube
a convex lens of power 6 diaptre is placed is contact with a concave lens of power 4 diaoptre what will be the nature and focal length of this combination
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Opthalmic Optics - OPTHALMIC OPTICS: Effective, Vertex, And True Powers: An ophthalmic prescription - Studocu
![Two thin lenses of focal lengths 20cm and 25cm are placed in contact. The effective power of - YouTube Two thin lenses of focal lengths 20cm and 25cm are placed in contact. The effective power of - YouTube](https://i.ytimg.com/vi/Ei3bAcuZGqc/maxresdefault.jpg)
Two thin lenses of focal lengths 20cm and 25cm are placed in contact. The effective power of - YouTube
![A convex lens of focal length f1 is kept in contact with a concave lens of focal length f2 . Find the focal length of the combination. A convex lens of focal length f1 is kept in contact with a concave lens of focal length f2 . Find the focal length of the combination.](https://dwes9vv9u0550.cloudfront.net/images/6041780/6e18e379-ba2b-4292-a151-997bdaadebd8.jpg)
A convex lens of focal length f1 is kept in contact with a concave lens of focal length f2 . Find the focal length of the combination.
![If two lenses with focal lengths 10 cm and 20 cm respectively are kept in contact with each other the - Brainly.in If two lenses with focal lengths 10 cm and 20 cm respectively are kept in contact with each other the - Brainly.in](https://hi-static.z-dn.net/files/d77/c18790d3cbf4470d68fff607574ac7bb.jpg)