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CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2001

  • question_answer
    An underwater swimmer is at a depth of 12 m below the surface of water. A bird is at a height of 18 m from the surface of water, directly above his eyes. For the swimmer the bird appears to be at a distance of .....from the surface of water. (Refractive index of water is 4/3):

    A)  24 m                                    

    B)  12 m    

    C)         18 m                    

    D)         9 m

    E)  16m

    Correct Answer: A

    Solution :

    \[_{g}{{\mu }_{a}}=\frac{actual\text{ }depth}{apparent\text{ }depth}\] Apparent depth\[=\frac{18}{\frac{3}{4}}=\frac{18\times 4}{3}=24\,m\]


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