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Figure 8
A lens of focal length is divided into two equal parts and then these parts are put in a…
A lens of focal length $f$ is divided into two equal parts and then these parts are put in a combination as shown in Figure 8 below.
(i)
What is the focal length of $L_1$?
(ii)
What is the focal length of the final combination?
Answer
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From ISC 2025 Specimen Physics Paper 1, question 14.