Ceratain radioactive substance reduces to `25%` of its value is `16 days`. Its half-life is

Options

A. 32 days
B. 8 days
C. 64 days
D. 28 days

Answer

D

Explanation

(d) `N = N_0 ((1)/(2))^((t)/(T)) rArr (N_0)/(4) = N_0 ((1)/(2))^((16)/(T)) rArr T = 8 days`.