- Home
- Standard 12
- Physics
13.Nuclei
medium
$^{215}At$ નો અર્ધઆયુ $100 \,\mu\,s$ છે,તો કેટલા ......... $\mu s$ સમય પછી $1/16^{th}$ ભાગ અવિભંજીત રહે?
A
$400$
B
$6.3 $
C
$40$
D
$300$
Solution
$N = {N_0}\,{\left( {\frac{1}{2}} \right)^n}$
$\Rightarrow$ $\frac{N}{{{N_0}}} = {\left( {\frac{1}{2}} \right)^{t/{T_{1/2}}}}$
$\Rightarrow$ $\frac{1}{{16}} = {\left( {\frac{1}{2}} \right)^{t/100}}$
$\Rightarrow$ $ t = 400 \,\mu \,sec$
Standard 12
Physics
