A sample initially consists of No radioactive atoms of a single isotope. After a time, t, the number N of radioactive atoms of the isotope is given by: N=Noe-λt (i.) Sketch a graph of this equation and show on the graph the time equal to the half-life of the sample, T1/2. (ii.) Explain what is meant by disintegration rate of a sample and represent this on the graph at zero time and at time, T1/2. State the ratio of these two disintegration rates. (iii.) Explain the physical significance of the constant λ in the equation above

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Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.