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Q.3:(a) Briefly describe the radioactivity phenomena with examples. (b) The counting rate of a radioactive source in...

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Physics

Q.3:(a) Briefly describe the radioactivity phenomenawith examples.

(b) The counting rate of a radioactive source in thebeginning (t=0) is 4000 counts/s. After 10 seconds the countingrate drops to 1000/s.

(i) What is the half-life of the radioactivesource?

(ii) What will be counting rate after 20 s?


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