The convex surface of a piano-convex glass lens with curvature radius R = 40 cm comes into

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The convex surface of a piano-convex glass lens with curvature radius R = 40 cm comes into contact with a glass plate. A certain ring observed in reflected light has a radius r = 2.5 ram. Watching the given ring, the lens was gradually removed from the plate by a distance Ah = 5.0 m. What has the radius of that ring become equal to?
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College Physics

ISBN: 978-0495113690

7th Edition

Authors: Raymond A. Serway, Jerry S. Faughn, Chris Vuille, Charles A. Bennett

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