Question
At a marine animal park, Alison is looking through a glass window and watching dolphins swim underwater. If the dolphin is swimming directly toward her at $15 \mathrm{~m} / \mathrm{s}$, how fast does the dolphin appear to be moving?
Step 1
Refraction causes the light to bend, which can make objects appear closer or farther away than they actually are. In this case, the refraction will make the dolphin appear closer to Alison than it actually is. The index of refraction of water is about 1.33, and Show more…
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At a marine animal park, Alison is looking through a glass window and watching dolphins swim underwater. If the dolphin is swimming directly toward her at $15 \mathrm{m} / \mathrm{s}$ how fast does the dolphin appear to be moving?
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