If the decay or disintegration constant of a radioactive substance is $\beta $, then its half life and mean life are respectively
$(log_e \,2 =ln\, 2)$
If the decay or disintegration constant of a radioactive substance is $\beta $, then its half life and mean life are respectively
$(log_e \,2 =ln\, 2)$
- [IIT 1989]
- 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}} $
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- [JEE MAIN 2021]
$99 \%$ of a radioactive element will decay between
$99 \%$ of a radioactive element will decay between
- [AIIMS 2019]