Draw a graph of the time $t$ versus the number of undecay nucleus in a radioactive sample and write its characteristics.
Draw a graph of the time $t$ versus the number of undecay nucleus in a radioactive sample and write its characteristics.
The following characteristics are available from graph :
$(1)$ The number of undecay nucleus in the radioactive sample decreases exponentially with time. In the beginning the distintegration occurs quickly and as time goes on the disintegration slowly decreases. This graph is also known as decay curve.
$(2)$ From the graph one can determine the rate of disintegration and half life.
$(3)$ If decay constant is large then the rate of disintegration is also large.
$(4)$ Regardless of the type of radioactive substance it takes the entire decay for infinite time.
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- [AIIMS 1998]
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- [AIIMS 2003]