Of the active nuclei present in a radioactive sample has decayed in

PHYSICS · Single correct · A Level · Physics · Nuclear physics · Nuclear physics

Problem

\frac{7}{8}

of the active nuclei present in a radioactive sample has decayed in

8\,\text{s}

. The half-life of the sample is: (1)

2\,\text{s}

(2)

1\,\text{s}

(3)

7\,\text{s}

(4)

\frac{8}{3}\,\text{s}