defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Physics Nuclear Physics Radioactivity

The half life T1/2 and decay constant λ of a radioactive nucleus are related as:

1
\(T_{1/2} = \frac{\lambda}{2.303}\)
2
\(T_{1/2} = \frac{0.693}{λ}\)
3
\(T_{1/2} = \frac{2.303}{λ}\)
4
\(T_{1/2} = \frac{ln\:2\lambda}{e^{-2\lambda}}\)
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