Gce Model Questions Vol1 2023 Physics Question 9
Practice objective / multiple choice question 9 from the 2023 Gce Model Questions Vol1 Physics examination.
A converging lens L1 has a focal length of \(10\ \text{cm}\). A candle is placed to the left of L1 such that a sharp real image is formed on a screen \(12\ \text{cm}\) to the right of L1. A second thin converging lens L2 is positioned \(20\ \text{cm}\) to the right of L1. When the screen is moved to a position \(40\ \text{cm}\) to the right of L2, a sharp image of the same candle is again obtained. Determine the focal length of L2 in centimetres, giving your answer to two decimal places.
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About This Question
This is Gce Model Questions Vol1 2023 Physics Question 9. It is one of the objective questions from the 2023 Gce Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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