Neco 2021 Physics Question 21
Practice objective / multiple choice question 21 from the 2021 Neco Physics examination.
An object is placed \(30\ \text{cm}\) in front of a converging lens L1 of focal length \(20\ \text{cm}\). A second converging lens L2 is positioned \(10\ \text{cm}\) to the right of L1. The final image formed by the combination is located \(40\ \text{cm}\) to the right of L2. Find the focal length of L2 in centimetres.
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About This Question
This is Neco 2021 Physics Question 21. It is one of the objective questions from the 2021 Neco Physics examination.
Difficulty level: Medium .
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