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Asked by Prashant DIGHE | 11 Jan, 2020, 21:54: PM
answered-by-expert Expert Answer
If λ is decay constant of radioactive element, the mean life τ of this radioactive element is given by,
 
τ = 1/λ = T1/2 / 0.693 = 1.443 T1/2 ......................(1)
 
where T1/2 is half-life of radioactive element.
 
Hence mean life is greater than half life.
 
Hence if half-life of X equals to mean-life of Y, then  half-life of Y is less than half-life of X .
 
Hence Y will decay faster than X
Answered by Thiyagarajan K | 11 Jan, 2020, 22:18: PM

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