JEE Main & Advanced Physics Nuclear Physics And Radioactivity Question Bank Radioactivity

  • question_answer
    The half-life of \[^{215}At\] is \[100\mu s\]. The time taken for the radioactivity of a sample of \[^{215}At\] to decay to 1/16th of its initial value is                        [IIT-JEE (Screening) 2002]

    A)            \[400\,\mu s\]                     

    B)            \[6.3\,\mu s\]

    C)            \[40\,\mu s\]                       

    D)            \[300\mu s\]

    Correct Answer: A

    Solution :

               The radioactivity of a sample decays to \[\frac{1}{16}th\]of its initial value in four half lives.


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