CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2002

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

    A)  \[49{}^\circ \]to the horizontal

    B)  \[90{}^\circ \]with the vertical

    C)  \[49{}^\circ \]to the vertical

    D)  along the horizontal

    E)  in any direction

    Correct Answer: C

    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


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