The activity of a sample of a radioactiv...

The activity of a sample of a radioactive meterial is `A_1` , at time `t_1` , and `A_2` at time `t_2(t_2 gt t_1)` . If its mean life T, then

A

`A_2=A_1e^(t_1-t_2)//T`

B

`A_1-A_2=t_2-t_1`

C

`A_1t_1=A_2t_2`

D

`A_2=A_1e^(t_1//t_2)T`

Text Solution

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The correct Answer is:

A

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