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Physics 80 Online
OpenStudy (anonymous):

A submarine, 400 m under water, spots an enemy helicopter which is actually flying 1 km above the water surface. If the helicopter is 5.0 m long, to the submarine observer, it appears to be A 750 m above the water surface and 5.0 m long. B 750 m above the water surface and 3.75 m long. C 1.33 km above the water surface and 6.7 m long. D 1.33 km above the water surface and 5.0 m long. A submarine, 400 m under water, spots an enemy helicopter which is actually flying 1 km above the water surface. If the helicopter is 5.0 m long, to the submarine observer, it appears to be A 750 m above the water surface and 5.0 m long. B 750 m above the water surface and 3.75 m long. C 1.33 km above the water surface and 6.7 m long. D 1.33 km above the water surface and 5.0 m long. @Physics

OpenStudy (anonymous):

refraction makes things inside water smaller. But i'm not sure if you're looking from inside water to air if the things gets bigger. If so i would say the answer is C. cause the chopper and also the distance seems bigger. But i'm not sure

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