A convex lens of focal length $f_{1}=12$ cm forms a real image of a candle placed $u_{1}=18$ cm from the lens. A second convex lens of focal length $f_{2}=6$ cm is positioned $d$ cm to the right of the first lens.\
(a) If the second lens is placed $d=8$ cm from the first, determine the position of the final image relative to the second lens.\
(b) Find the overall magnification of the two‑lens system.\
(c) What value of $d$ would make the overall magnification equal to +1 (unity, upright image)?

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Accepted Answer

final image 4.9 cm right of lens 2; overall magnification ≈ -0.35; d = 18 cm for unity magnification

Neco Model Questions Vol1 2024 Physics Question 49

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