Created by StemPy LabA small mark lies at the bottom of a tank. An observer looks straight down through a layer of water cm deep, with a refractive index of . By how much does the mark seem raised?
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← A photographer sticks black tape over the lower half of the front of a camera lens and then photographs a street scene. How does the picture compare with one taken with the whole lens open?A fish is 0.7 m below the surface of a still pond, and a bird is 1.6 m above the surface, on the same vertical line. The refractive index of water is 1.33. How far from itself does the fish think the bird is? →
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