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DUMET Medical DUMET Medical Solved Paper-2010

  • question_answer
    When a lens of refractive index \[{{n}_{1}}\] is placed in a liquid of refractive index \[{{n}_{2}}\] the lens looks to be disappeared only if

    A)  \[{{n}_{1}}={{n}_{2}}/2\]          

    B)  \[{{n}_{1}}=3{{n}_{2}}/4\]

    C) \[{{n}_{1}}={{n}_{2}}\]           

    D)  \[{{n}_{1}}=5{{n}_{2}}/4\]

    Correct Answer: C

    Solution :

     If refractive index of lens \[{{n}_{1}}\] is equal to refractive index of liquid \[{{n}_{2}}\], then lens be haves as a plane glass plate and becames invisible in the medium.


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