JEE Main & Advanced Physics Ray Optics Sample Paper Topic Test - Refraction of Light Through Curved Surfaces

  • question_answer
    An air bubble in a glass sphere having 4 cm diameter appears 1 cm from surface nearest to eye when looked along diameter. If \[_{a}{{\mu }_{g}}=1.5,\] the distance of bubble from refracting surface is

    A) 1.2 cm

    B) 3.2 cm

    C) 2.8 cm

    D) 1.6 cm

    Correct Answer: A

    Solution :

    By using \[\frac{{{\mu }_{2}}}{v}-\frac{{{\mu }_{1}}}{u}=\frac{{{\mu }_{2}}-{{\mu }_{1}}}{R}\]
    where \[u=?,\,\,v=-1\,\,cm,\,\,{{\mu }_{1}}=1.5,\,\,{{\mu }_{2}}=1,\,\,R=-2\,cm\]
    \[\Rightarrow \]   \[u=-\frac{6}{5}\,=-1.2\,cm\]

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