The half-life of is

PHYSICS · Single correct · CBSE · Physics · Nuclei · Nuclei

Problem

The half-life of

^{215}\text{At}

100\,\mu\text{s}

. The time taken for the activity of a sample of

^{215}\text{At}

to decay to

\frac{1}{16}

of its initial value is (1)

400\,\mu\text{s}

(2)

63\,\mu\text{s}

(3)

40\,\mu\text{s}

(4)

300\,\mu\text{s}