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OpenStudy (anonymous):
An observer in a small boat is floating on the surface of a large lake with clear, but contaminated water with index of refraction n = 1.38. Nearby is a wooden post emerging from the water which is embedded in the lake bottom, a distance h = 7.20 meters below the water's surface. What is the maximum distance from the post at which the observer would be able to see the bottom of the post?
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