Waec Model Questions Vol1 2019 Physics Question 16
Practice objective / multiple choice question 16 from the 2019 Waec Model Questions Vol1 Physics examination.
A converging lens is used to form a sharp image of a candle on a screen. The distance between the candle and the screen is 120 cm. When the lens is placed at one position, a sharp image is obtained. If the lens is moved 20 cm towards the screen, a sharp image is again obtained on the same screen. What is the focal length of the lens (in cm, to one decimal place)?
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About This Question
This is Waec Model Questions Vol1 2019 Physics Question 16. It is one of the objective questions from the 2019 Waec Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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