![Physics 55.4 Optics- Multiple Lenses (3 of 12) The Double Lens: The Equivalent Focal Length - YouTube Physics 55.4 Optics- Multiple Lenses (3 of 12) The Double Lens: The Equivalent Focal Length - YouTube](https://i.ytimg.com/vi/GxemspUuOSU/sddefault.jpg)
Physics 55.4 Optics- Multiple Lenses (3 of 12) The Double Lens: The Equivalent Focal Length - YouTube
![Derivation of Equivalent Focal Length of Combination of two lens separated by distance #kamaldheerya - YouTube Derivation of Equivalent Focal Length of Combination of two lens separated by distance #kamaldheerya - YouTube](https://i.ytimg.com/vi/JTOSQLL93pY/maxresdefault.jpg)
Derivation of Equivalent Focal Length of Combination of two lens separated by distance #kamaldheerya - YouTube
Derive an expression for equivalent focal length of two thin lenses kept in contact. - Sarthaks eConnect | Largest Online Education Community
![Physic 55.4: Optics- Multiple Lenses (4 of 12) The Triple Lens: The Equivalent Focal Length - YouTube Physic 55.4: Optics- Multiple Lenses (4 of 12) The Triple Lens: The Equivalent Focal Length - YouTube](https://i.ytimg.com/vi/w9tGbGVpM-8/hqdefault.jpg)
Physic 55.4: Optics- Multiple Lenses (4 of 12) The Triple Lens: The Equivalent Focal Length - YouTube
![Two thin convex lenses L1 and L2 of focal lengths f1 and f2 respectively, are placed coaxially in contact. An object is placed at a point beyond the focus of lens L1 . Two thin convex lenses L1 and L2 of focal lengths f1 and f2 respectively, are placed coaxially in contact. An object is placed at a point beyond the focus of lens L1 .](https://haygot.s3.amazonaws.com/questions/1683138_1785194_ans_7f84fa016e71411a8fde02410972563a.jpg)
Two thin convex lenses L1 and L2 of focal lengths f1 and f2 respectively, are placed coaxially in contact. An object is placed at a point beyond the focus of lens L1 .
Derive the expression for effective focal length of two thin lenses kept in contact. - Sarthaks eConnect | Largest Online Education Community
![When two thin lenses of focal lengths f1 and f2 are kept in contact, prove that their combined focal length f is given by - Zigya When two thin lenses of focal lengths f1 and f2 are kept in contact, prove that their combined focal length f is given by - Zigya](https://www.zigya.com/application/zrc/images/qvar/IPHEN12114088-1.png)
When two thin lenses of focal lengths f1 and f2 are kept in contact, prove that their combined focal length f is given by - Zigya
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Deduce the equivalent focal length of two convex lenses of focal lengthsf1andf2 when placed in contact
![Consider two thin lenses, one of focal length f1 and the other of focal length f2, placed in contact with each other. Apply the thin lens equation to each of these lenses Consider two thin lenses, one of focal length f1 and the other of focal length f2, placed in contact with each other. Apply the thin lens equation to each of these lenses](https://homework.study.com/cimages/multimages/16/capture5473864438025005440.png)
Consider two thin lenses, one of focal length f1 and the other of focal length f2, placed in contact with each other. Apply the thin lens equation to each of these lenses
![Two thin convex lens L1 and L2 of focal lengths f1 and f2 respectively,are placed coaxially in contact An - Physics - Ray Optics And Optical Instruments - 10695119 | Meritnation.com Two thin convex lens L1 and L2 of focal lengths f1 and f2 respectively,are placed coaxially in contact An - Physics - Ray Optics And Optical Instruments - 10695119 | Meritnation.com](https://s3mn.mnimgs.com/img/shared/ck-files/ck_57f27e198e457.png)
Two thin convex lens L1 and L2 of focal lengths f1 and f2 respectively,are placed coaxially in contact An - Physics - Ray Optics And Optical Instruments - 10695119 | Meritnation.com
![a) Two thin lenses are placed coaxially in contact. Obtain the expression for the focal length of this combination in terms of the focal lengths of the two lenses. (b) A converging a) Two thin lenses are placed coaxially in contact. Obtain the expression for the focal length of this combination in terms of the focal lengths of the two lenses. (b) A converging](https://cdn.entrance360.com/media/uploads/2020/04/23/103125_1_1.jpg)