Question

Define half life of a radioactive sample..??... ​

Answer 1

Answer:

Half-life, in radioactivity, the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay (change spontaneously into other nuclear species by emitting particles and energy), or, equivalently, the time interval required for the number of disintegrations per second of a radioactive material to decrease by one-half.

Answer 2

Answer:

$\huge\underline\mathfrak\blue{Answer}$

Half life of a radioactive substance(τ1/2) measures the time it takes for a given amount of the substance to become reduced by half as a consequence of decay, and therefore, the emission of radiation.It is related to radioactive decay constant k as

τ1/2 = ln2/k

Also its relation with mean life λm=1/k is

τ1/2=λmln2

.

I hope this helps you.........