A fish under water observes a freely falling stone in air. If The refracting index of water is 4/3 what is the apparent acceleration of the stone as observed by the fish. Sir, please give a detailed explanation.

Asked by Shourya Mukherjee | 10th Nov, 2012, 07:51: PM

Expert Answer:

Under normal circumstances, the acceleration is 9.8m/s2 'because it's a free fall.
In water, the velocity of light reduces by 1.33 times as the refractive index of water is 4/3. So the apparent acceleration would be 1.3 times less or 9.8/1.3 = 7.36m/s2

Answered by  | 12th Nov, 2012, 12:59: AM

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