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  3. WB JEE Medical

WB JEE Medical WB JEE Medical Solved Paper-2007

  • question_answer
    Time taken by sunlight to pass through a window of thickness 4 mm whose refractive   index is\[\frac{3}{2}\]is

    A)  \[2\times {{10}^{-4}}s\]                               

    B)  \[2\times {{10}^{4}}s\]

    C)  \[2\times {{10}^{-11}}s\]                            

    D)  \[2\times {{10}^{11}}s\]

    Correct Answer: C

    Solution :

                     Time taken \[=\frac{\mu t}{c}\] \[=\frac{\frac{3}{2}\times 4\times {{10}^{-3}}}{3\times {{10}^{8}}}\]                 \[=2\times {{10}^{-11}}s\]


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