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26-04-2024
Physics

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Radii of curvature of a converging lens are in the ratio 1: 2. Its focal length is 6cm and refractive index is 1.5. Then its radii of curvature are respectively.
A. 9cm and 18cm
B. 3cm and 6cm
C. 4.5cm and 9cm
D. 6cm and 12cm

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