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Wave Optics
Question
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Define the activity of a radionuclide. Write its SI unit. Give a plot of the activity of a radioactive species versus time. 

Answer

The number of radioactive disintegrations taking place per second in a given sample is called the activity of a sample. 

Its SI unit is becquerel.

The graph between the activity of a radioactive species and time is given below: 

 

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