The surfaces of the lens have radii of curvature 271 cm, Ask an Expert

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The surfaces of the lens have radii of curvature 27.1 cm (located on the object side of the lens) and 55.3 cm (located on the side opposite to the object side of the lens). And from the previous problme my focal length was -62.46 cm.

What is the index of refraction?

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