A radioactive nucleus can decay by two different processes. The mean value period for the first process is t1 and that for the second process is t2. The effective mean value period for the two processes is

t1+t2

t1t2t1+t2

√t1t2

t1+t22

A

t1+t22

B

√t1t2

C

t1+t2

D

t1t2t1+t2

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Solution

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Mean value: λ1=1t1 λ2=1t2

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