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JEE Main & Advanced Physics Ray Optics Question Bank Total Internal Reflection

  • question_answer
    A fist looking from within water sees the outside world through a circular horizon. If the fish \[\sqrt{7}\]cm below the surface of water, what will be the radius of the circular horizon                                          [Kerala PMT 2005]

    A)            3.0 cm                                     

    B)            4.0 cm

    C)            4.5 cm                                     

    D)            5.0 cm

    Correct Answer: A

    Solution :

               Radius of horizon circle \[=\frac{3h}{\sqrt{7}}\]\[=\frac{3\sqrt{7}}{\sqrt{7}}=3\,cm\].


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