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

  • question_answer
    The speed of light in air is \[3\times {{10}^{8}}\,\,m/s\]. What will be its speed in diamond whose refractive index is 2.4 [KCET 1993]

    A)            \[3\times {{10}^{8}}\] \[m/s\]                                          

    B)            332 \[m/s\]

    C)            \[1.25\times {{10}^{8}}\] m/s                                           

    D)            \[7.2\times {{10}^{8}}\] \[m/s\]

    Correct Answer: C

    Solution :

               \[v=\frac{c}{\mu }=\frac{3\times {{10}^{8}}}{2.4}=1.25\times {{10}^{8}}m/s\]


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