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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 circl

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

Option: 1

36\sqrt7


Option: 2

36/\sqrt7


Option: 3

36\sqrt5


Option: 4

4\sqrt5


Answers (1)

best_answer

\begin{array}{l} \sin i_{c}=\frac{1}{\mu}=\frac{r}{\sqrt{r^{2}+h^{2}}} \\ \text { Using } h=12 \mathrm{cm}, \mu= \frac{4}{3} \\ \qquad r=\frac{36}{\sqrt{7}} \end{array}

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HARSH KANKARIA

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