Post Utme Caleb University 2017 Physics Question 2
Practice objective / multiple choice question 2 from the 2017 Post Utme Caleb University Physics examination.
A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length -15 cm. What is the focal length of the combination?
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About This Question
This is Post Utme Caleb University 2017 Physics Question 2. It is one of the objective questions from the 2017 Post Utme Caleb University Physics examination.
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