Can we measure the focal length of the divergent lens by placing this lens in front of the convergent lens (given all lenses are coaxial)? - Quora
![A parallel beam of light is incident on diverging lens of focal length 12 cm. The emergent beam passes through a converging lens of focal length 20 cm placed coaxial with it. A parallel beam of light is incident on diverging lens of focal length 12 cm. The emergent beam passes through a converging lens of focal length 20 cm placed coaxial with it.](https://homework.study.com/cimages/multimages/16/4587233786064874567982.png)
A parallel beam of light is incident on diverging lens of focal length 12 cm. The emergent beam passes through a converging lens of focal length 20 cm placed coaxial with it.
![Vector Scientific Illustration Convex Or Converging Lens Concave Or Diverging Lens Light Rays Passing Through Lens Physics Optics Photography Positive Negative Labeled Lens Isolated On White Stock Illustration - Download Image Now - Vector Scientific Illustration Convex Or Converging Lens Concave Or Diverging Lens Light Rays Passing Through Lens Physics Optics Photography Positive Negative Labeled Lens Isolated On White Stock Illustration - Download Image Now -](https://media.istockphoto.com/id/1287560968/vector/vector-scientific-illustration-convex-or-converging-lens-concave-or-diverging-lens-light.jpg?s=612x612&w=0&k=20&c=3rsqvZVCvxob_vgB0rg_buFU7Na2e8EGEc4TNuSP7TU=)