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JEE Main & Advanced Physics Ray Optics Question Bank Refraction of Light at Plane Surfaces

  • 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 from the surface of water equal to (Refractive Index of water is 4/3) [KCET (Engg.) 2001]

    A)            24 m                                        

    B)            12 m

    C)            18 m                                        

    D)            9 m

    Correct Answer: A

    Solution :

               \[\mu =\frac{h'}{h}\Rightarrow h'=\mu h=\frac{4}{3}\times 18=24\,\,cm\]


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