The refractive index of water is 1.33. The di | vedclass

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(C) The refractive index of water is $\mu = 1.33 \approx 4/3$.When the sun is setting,the light rays from the sun are incident on the water surface at

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$49^o$ to the vertical

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(C) The refractive index of water is $\mu = 1.33 \approx 4/3$.When the sun is setting,the light rays from the sun are incident on the water surface at an angle of incidence $i = 90^o$.According to Snell's Law,$\mu_1 \sin(i) = \mu_2 \sin(r)$,where $\mu_1 = 1$ (air) and $\mu_2 = 1.33$ (water).$\sin(r) = \frac{1}{1.33} \sin(90^o) = \frac{1}{1.33} \approx 0.75$.$r = \arcsin(0.75) \approx 48.75^o \approx 49^o$.This angle $r$ is the angle of refraction with respect to the normal (vertical).Therefore,the man must look at an angle of $49^o$ to the vertical to see the setting sun.

The refractive index of water is $1.33$. The direction in which a man under water should look to see the setting sun is

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