A fraction $f_1$ of a radioactive sample decays in one mean life, and a fraction $f_2$ decays in one half-life.
$f_1 > f_2$
$f_1 < f_2$
$f_1 = f_2$
May be $(A),(B)$ or $(C)$ depending on the values of the mean life and half life
Curie is a unit of
Half lives for $\alpha$ and $\beta$ emission of a radioactive material are $16$ years and $48$ years respectively. When material decays giving $\alpha$ and $\beta$ emission simultaneously then time in which $\frac{3}{4}$ th of the material decays is ....... years
Give the equation form of exponential law.
Activity of a radioactive substance can be represented by various unit. Select correct option
The half-life of radioactive Polonium $(Po)$ is $138.6$ days. For ten lakh Polonium atoms, the number of disintegrations in $24$ hours is