Derive the expression for effective focal length of two thin lenses kept in contact. - Sarthaks eConnect | Largest Online Education Community
![Define Power of a Lens. Write Its Units. Deduce the Relation 1 F = 1 F 1 + 1 F 2 for Two Thin Lenses Kept in Contact Coaxially. - Physics | Shaalaa.com Define Power of a Lens. Write Its Units. Deduce the Relation 1 F = 1 F 1 + 1 F 2 for Two Thin Lenses Kept in Contact Coaxially. - Physics | Shaalaa.com](https://www.shaalaa.com/images/_4:f57012de240f492e8fcbadf1fbe3f6a5.png)
Define Power of a Lens. Write Its Units. Deduce the Relation 1 F = 1 F 1 + 1 F 2 for Two Thin Lenses Kept in Contact Coaxially. - Physics | Shaalaa.com
![When two thin lenses of focal lengths $f_1$ and $f_2$ are kept coaxially and in contact, prove that their combined focal length “f” is given by : $\\dfrac{1}{f} = \\dfrac{1}{f_1} + \\dfrac{1}{f_2}$ When two thin lenses of focal lengths $f_1$ and $f_2$ are kept coaxially and in contact, prove that their combined focal length “f” is given by : $\\dfrac{1}{f} = \\dfrac{1}{f_1} + \\dfrac{1}{f_2}$](https://www.vedantu.com/question-sets/369e953a-ba44-4dd9-8532-7cbd13219345737879524792777984.png)
When two thin lenses of focal lengths $f_1$ and $f_2$ are kept coaxially and in contact, prove that their combined focal length “f” is given by : $\\dfrac{1}{f} = \\dfrac{1}{f_1} + \\dfrac{1}{f_2}$
Draw a ray diagram to show the image formation by a combination of two thin convex lenses in contact. - Sarthaks eConnect | Largest Online Education Community
![When two thin lenses are kept in contact, prove that their combined or effective focal length F is given by $\\dfrac{1}{F}=\\dfrac{1}{{{f}_{1}}}+\\dfrac{1}{{{f}_{2}}}$ where the terms have their usual meaning. When two thin lenses are kept in contact, prove that their combined or effective focal length F is given by $\\dfrac{1}{F}=\\dfrac{1}{{{f}_{1}}}+\\dfrac{1}{{{f}_{2}}}$ where the terms have their usual meaning.](https://www.vedantu.com/question-sets/ba1eb277-1f97-4221-adff-6e78918000532476634771778537785.png)
When two thin lenses are kept in contact, prove that their combined or effective focal length F is given by $\\dfrac{1}{F}=\\dfrac{1}{{{f}_{1}}}+\\dfrac{1}{{{f}_{2}}}$ where the terms have their usual meaning.
![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
When two thin lenses are kept in contact, prove that their combined or effective focal length F is given by 1/F = 1/f1 + 1/f2 where the terms have their usual meaning.
![Two thin lenses of power `+ 6 D and - 2 D` are in contact. What is the focal length of the - YouTube Two thin lenses of power `+ 6 D and - 2 D` are in contact. What is the focal length of the - YouTube](https://i.ytimg.com/vi/-RgwskmDdhU/maxresdefault.jpg)
Two thin lenses of power `+ 6 D and - 2 D` are in contact. What is the focal length of the - YouTube
![When Two Thin Lenses Are Kept in Contact, Prove that Their Combined Or Effective Focal Length F is Given by : 1/F = 1/F_1 + 1/F_2 Where the Terms Have Their Usual When Two Thin Lenses Are Kept in Contact, Prove that Their Combined Or Effective Focal Length F is Given by : 1/F = 1/F_1 + 1/F_2 Where the Terms Have Their Usual](https://www.shaalaa.com/images/_4:965f1758e727437d877abd7c8627f6ab.png)