![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
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 : 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)
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 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 : $\\dfrac{1}{f} = \\dfrac{1}{f_1} + \\dfrac{1}{f_2}$
![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
![Two thin lenses of power +5 D and -2.5 D are in contact. What is the focal length of the combination - YouTube Two thin lenses of power +5 D and -2.5 D are in contact. What is the focal length of the combination - YouTube](https://i.ytimg.com/vi/hqr63xnAO9s/maxresdefault.jpg?sqp=-oaymwEmCIAKENAF8quKqQMa8AEB-AH-CYAC0AWKAgwIABABGH8gMCgiMA8=&rs=AOn4CLC1xYch9xsEdpHkkIEdD3wPbfhFRA)
Two thin lenses of power +5 D and -2.5 D are in contact. What is the focal length of the combination - YouTube
![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 $\\dfrac{1}{F}=\\dfrac{1}{{{f}_{1}}}+\\dfrac{1}{{{f}_{2}}}$ 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)