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

KEAMKEAM 2002

Solution:

$ \sin \theta =\frac{1}{{{\mu }_{w}}}=\frac{1}{1.33}\Rightarrow \theta ={{\sin }^{-1}}\left( \frac{1}{1.33} \right) $ $ =49{}^\circ $ to the vertical