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Calculate the half-life of Th-232 which has a decay constant of 49.15×10-¹2 s-¹.

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Concept and Principle:

The rate at which unstable radioactive nuclei decay in a sample of material is called the activity of the sample.

Half-life is the time that it takes for the activity to be reduced by half. It is given by,

$t_{\frac{1}{2}} = \frac{0 .693}{λ}$

Here λ is the decay constant, the decay probability per nucleus per second.

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