MCQ
If the decay or disintegration constant of a radioactive substance is $\lambda ,$ then its half life and mean life are respectively
- A$\frac{1}{\lambda}$ and $\frac{\log _e 2}{\lambda}$
- ✓$\frac{\log _e 2}{\lambda}$ and $\frac{1}{\lambda}$
- C$\lambda \log _e 2$ and $\frac{1}{\lambda}$
- D$\frac{\lambda}{\log _e 2}$ and $\frac{1}{\lambda}$