What is meant by the term half life in physics?

Half-life (abbreviated t1?2) is the time required for a quantity to reduce to half its initial value. The term is commonly used in nuclear physics to describe how quickly unstable atoms undergo, or how long stable atoms survive, radioactive decay. read more

The half-life of a radioactive substance is a characteristic constant. It 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. read more

1. Half-life is the time taken for half of the radioactive nuclei to decay. 2. Half-life is the time taken for the count rate to fall to half of its original reading. There are a number of ways to define half-life. Remember one of the above definitions, it may be useful in the exams. An Explanation of Half-life. read more

is half-life (b) State the meaning of the term half -life. The half-life of a radioactive material is the time taken for the activity of the sample to decrease to half of its original value. read more