The radioactivity of a sample is at a time and at a time . If the half-life of the specimen is , the number of atoms that have disintegrated in the time is equal to

Question

The radioactivity of a sample is $R_1$ at a time $T_1$ and $R_2$ at a time $T_2$. If the half-life of the specimen is $T$, the number of atoms that have disintegrated in the time $(T_2 - T_1)$ is equal to

Prashant Kotian · Accepted Answer

Correct answer: D. Activity . Initial nuclei , final nuclei . Atoms disintegrated = . Substituting , we get disintegrated atoms = . Therefore, correct answer is D.

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