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

  • question_answer
    Absolute refractive indices of glass and water are \[\frac{3}{2}\] and \[\frac{4}{3}\].  The ratio of velocity of light in glass and water will be [UPSEAT 1999]

    A)            4 : 3                                          

    B)            8 : 7

    C)            8 : 9                                          

    D)            3 : 4

    Correct Answer: C

    Solution :

               \[v\propto \frac{1}{\mu }\Rightarrow \]\[\frac{{{v}_{1}}}{{{v}_{2}}}=\frac{{{\mu }_{2}}}{{{\mu }_{1}}}\Rightarrow \frac{{{v}_{g}}}{{{v}_{w}}}=\frac{{{\mu }_{w}}}{{{\mu }_{g}}}=\frac{4/3}{3/2}=\frac{8}{9}\]


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