Question

diff. B/w mean life and half life​

Answer 1

Explanation:

The difference between half life and average life is given below :-

Half life Average life

(i) The time required for half of the radioactive substance to decay is called as half life of that substance.

(ii) It is denoted by t

2

1

(iii) t

2

1

= half life =(

λ

ln2

)

where λ is decay constant. (i) The expected life for the radioactive substance within a sample is called as average life of that substance.

(ii) It is denoted by τ.

(iii) τ= average life =

λ

1

Answer 2

❣Mean life❣

Mean life, in radioactivity, average lifetime of all the nuclei of a particular unstable atomic species. This time interval may be thought of as the sum of the lifetimes of all the individual unstable nuclei in a sample, divided by the total number of unstable nuclei present.

❣Half life❣

Half-Life is a first-person shooter video game developed by Valve and published by Sierra Studios for Microsoft Windows in 1998. It was Valve's debut product and the first game in the Half-Life series.

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