एक रेडियोऐक्टिव पदार्थ का क्षय-नियतांक \( \lambda \) है। इसकी अर्द्धआयु है : (A) \( 1 / \lambda ...

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एक रेडियोऐक्टिव पदार्थ का क्षय-नियतांक \( \lambda \) है। इसकी अर्द्धआयु है :
(A) \( 1 / \lambda \)
(B) \( \lambda\left(\log _{e} 2\right) \)
(C) \( \log _{e} 2 / \lambda \)
(D) \( \lambda / \log _{e} 2 \)
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