There are n number of radioactive nuclei in a sample that undergoes beta decay. If from the sample, `n'` number of `beta`-particels are emitted every `2s`, then half-life of nuclei is .

Options

A. n/2
B. 0.693 `xx ` (2n/n')
C. 0.693 ln (2n / n')
D. `0.693 xx ` n/n'

Answer

B

Explanation

`t_(1//2) = (0.639)/(lambda)`