The activity of a sample of radioactive ...

The activity of a sample of radioactive material `A_(1)` at time `t_(1)` and `A_(2)` at time `t_(2)(t_(2)gtt_(1))`. Its mean life is `T`.

`(t""_(2)-t""_(1))/("in"(R""_(1)//R""_(2)))`

`(t""_(2)-t""_(1))"in"(R""_(1)//R""_(2))`

`((t""_(2)-t""_(1)))/("in"(R""_(2)//R""_(2))`

`("in"(R""_(2)//R""_(2)))/((t""_(2)-t""_(1)))`

Text Solution

Verified by Experts

The correct Answer is:

`t""_(2)="in"/lamdaxx1/R""_(2),t""_(1)="in"/lamdaxx1/R""_(1)`

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