Nuclear Physics and RadioactivityHard
Question
The half - life of the radioactive radon is 3.8 days. The time , at the end of which 1 / 20th of the radon sample will remain undecided, is (given log10 e = 0.4343):
Options
A.3.8 day
B.16.5 day
C.33 day
D.76 day
Solution
M = M0e-γt 
= M0e-λt ⇒ ln 
= - λt
⇒
T1/2 = t ⇒ 
T1/2 = t
⇒ t = 16.42 days
= M0e-λt ⇒ ln = - λt⇒
T1/2 = t ⇒ T1/2 = t⇒ t = 16.42 days
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