Derive an expression for the effective (equivalent) focal length of two thin lenses in contact. - Sarthaks eConnect | Largest Online Education Community
![The equivalent lens system of the two-mirror MPC cavity showing the... | Download Scientific Diagram The equivalent lens system of the two-mirror MPC cavity showing the... | Download Scientific Diagram](https://www.researchgate.net/publication/270724911/figure/fig1/AS:392071635587077@1470488570541/The-equivalent-lens-system-of-the-two-mirror-MPC-cavity-showing-the-round-trip-matrices-M.png)
The equivalent lens system of the two-mirror MPC cavity showing the... | Download Scientific Diagram
![Class 12th Ray Optics] Why do the take that needle at equivalent focus and not at 2F position of the equivalent lens. I mean, if I consider needle as point object then Class 12th Ray Optics] Why do the take that needle at equivalent focus and not at 2F position of the equivalent lens. I mean, if I consider needle as point object then](https://i.redd.it/20ly3y7ga7q61.jpg)
Class 12th Ray Optics] Why do the take that needle at equivalent focus and not at 2F position of the equivalent lens. I mean, if I consider needle as point object then
i) what do you mean by the equivalent lens? Derive an expression tor the equivalent focal length of system of two lenses placed at a certain - Sarthaks eConnect | Largest Online
![Table of Equivalent Focal Lengths for APS-C sensor: Beginners Questions Forum: Digital Photography Review Table of Equivalent Focal Lengths for APS-C sensor: Beginners Questions Forum: Digital Photography Review](https://3.img-dpreview.com/files/g/TS560x560~2182310.jpg)
Table of Equivalent Focal Lengths for APS-C sensor: Beginners Questions Forum: Digital Photography Review
![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/hqdefault.jpg)
Physics 55.4 Optics- Multiple Lenses (3 of 12) The Double Lens: The Equivalent Focal Length - YouTube
![The equivalent lens system of the two-mirror MPC cavity showing the... | Download Scientific Diagram The equivalent lens system of the two-mirror MPC cavity showing the... | Download Scientific Diagram](https://www.researchgate.net/profile/Arif-Mustafazade/publication/270724911/figure/fig1/AS:392071635587077@1470488570541/The-equivalent-lens-system-of-the-two-mirror-MPC-cavity-showing-the-round-trip-matrices-M_Q640.jpg)