Question

The decay constant of a radioactive sample is `lambda`. The half-life and mean life of the sample respectively are
A. `(1)/(lambda), ("In" 2)/(lambda)`
B. `("In" 2)/(lambda), (1)/(lambda)`
C. `lambda "In" 2, (1)/(lambda)`
D. `(lambda)/("In" 2), (1)/(lambda)`

Answer 1

Correct Answer - b
`t_(1//2) = (log_(e)2)/(lambda)` and average life `= (1)/(lambda)`