Q. 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 $\frac{\log_{e}2}{\lambda}$
B) $\frac{\log_{e}2}{\lambda}$ and $\frac{1}{\lambda}$
C) $\lambda\log_{e}2$ and $\frac{1}{\lambda}$
D) $\frac{\lambda}{\log_{e}2}$ and $\frac{1}{\lambda}$
Explanation
The correct answer is Option B: $\frac{\log_{e}2}{\lambda}$ and $\frac{1}{\lambda}$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.