A radioactive sample consists of two distinct species having equal number of atoms initially. The mean life time of one species is τ τ and that of the other is 5 τ τ . The decay products in both cases are stable. A plot is made of the total number of radioactive nuclei as a function of time. Which of the following figures best represents the form of this plot?
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The total number of atoms neither remains constant (as in option nor can ever increase (as in option and ). They will continuously decrease with time. Therefore option is correct.
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