NEET Class neet Answered
please answer this
Asked by Prashant DIGHE | 15 Jan, 2020, 10:16: PM
Expert Answer
For radioactive decay, rate of disintegration is proportional to number of undecayed atoms present.
dN/dt = -λN ........................... ( 1 )
where λ is decvay constant, -ve sign indicates rate of disinegeration decreases.
we have radioactive decay equation as, N = No e-λt .....................(2)
where No is the number of undecayed atoms present at t=0.
hence from eqn.(1) and (2), we get, | dN/dt | = λ No e-λt
Hence figure (4) shows the correct variation of rate of disintegration as a function of time.
Answered by Thiyagarajan K | 15 Jan, 2020, 10:57: PM
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