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A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is 4 / 3 and the fish is 12 ~cm below the surface, the radius of this circle in cm is

Options

  1. A36 7
  2. B36 / 7
  3. C36 5
  4. D4 5

Correct answer

B. 36 / 7

Step-by-step solution

r= h ^2-1 = 36 7

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