The decay constant of a radioactive samp...

The decay constant of a radioactive sample is `'lambda'`. The half-life and mean life of the sample are respectively a)`1/lamda,("in"2)/lamda` b)`("in"2)/lamda,1/lamda` c)`"in"2,1/lamda` d)`lamda/("in"2),1/lamda`

A

`1/lambda , ("In" 2 )/(lambda)`

B

`("In" 2)/(lambda) , 1/lambda`

C

`lambda` In `2, 1/lambda`

D

`lambda/("In "2) , 1/lambda`

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The correct Answer is:

B

`t_(1//2) = (log_e 2)/(lambda) `, Average life = `1/lambda`

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