A radioactive sample consists of two distinct species having equal number of atoms initially. The mean life time of one species is τ and that of the other is 5 τ . The decay products in both cases are

Question

A radioactive sample consists of two distinct species having equal number of atoms initially. The mean life time of one species is $τ$ and that of the other is $5 τ$ . 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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Answer:

D

Solution:

Bot $N_{1}$ and $N_{2}$ are exponentially decreasing function, Hence $N_{1} + N_{2}$ is also an exponentially decreasing function.]

TestHub · Accepted Answer

Bot N 1 ​ and N 2 ​ are exponentially decreasing function, Hence N 1 ​ + N 2 ​ is also an exponentially decreasing function.]

Physics - Modern Physics Question with Solution | TestHub

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