cse • paper_1 • waves_oscillations
[UPSC CSE 2004] Geometrical Optics (Q162, 20M)
A thin converging lens and a thin diverging lens are placed coaxially at a distance of 5 cm. If the focal length of each lens is 10 cm, find for the combination (i) the focal length, (ii) the power, (iii) the positions of the principal points.
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