A radioactive element $ThA (_{84}Po^{216})$ can undergo $\alpha$ and $\beta$ are type of disintegrations with half-lives, $T_1$ and $T_2$ respectively. Then the half-life of ThA is
A radioactive element $ThA (_{84}Po^{216})$ can undergo $\alpha$ and $\beta$ are type of disintegrations with half-lives, $T_1$ and $T_2$ respectively. Then the half-life of ThA is
- A
$T_1 + T_2$
- B
$T_1 \cdot T_2$
- C
$T_1 - T_2$
- D
$\frac{{{T_1}{T_2}}}{{{T_1} + {T_2}}}$
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