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.
![A diverging lens of focal length `F` is cut into two idential parts, each forming a plano concave - YouTube A diverging lens of focal length `F` is cut into two idential parts, each forming a plano concave - YouTube](https://i.ytimg.com/vi/9F8yhttYOQ4/maxresdefault.jpg?sqp=-oaymwEmCIAKENAF8quKqQMa8AEB-AH-CYAC0AWKAgwIABABGHIgSShAMA8=&rs=AOn4CLD1Y4rFgydSExT5L3JwRkVkO0gobQ)
A diverging lens of focal length `F` is cut into two idential parts, each forming a plano concave - YouTube
![30. (i) Define focal length of a spherical lens. i) A divergent lens has a focal length of 30 cm. At what distance should an object of height 5 cm from the 30. (i) Define focal length of a spherical lens. i) A divergent lens has a focal length of 30 cm. At what distance should an object of height 5 cm from the](https://toppr-doubts-media.s3.amazonaws.com/images/7792220/3cdb42dc-44e9-49d1-b31b-7f94cfb7c64e.jpg)