Physics
Physics, 08.04.2020 03:12, wolfgirl4762

An amateur astronomer grinds a double convex lens whose surfaces have radii of curvature of 40 cm and 60 cm. The glass has an index of refraction of 1.54. What is the focal length of this lens in air?

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An amateur astronomer grinds a double convex lens whose surfaces have radii of curvature of 40 cm an...

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