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Physics
Physics
Problem
The activity of a radioactive sample is
A
0
A_0
A
0
at
t
=
0
t=0
t
=
0
and
A
0
e
\frac{A_0}{e}
e
A
0
at
t
=
5
t=5
t
=
5
minute. The time in which activity is reduced to half of initial value is: a.
ln
2
5
\ln \frac{2}{5}
ln
5
2
b.
5
ln
2
\frac{5}{\ln 2}
l
n
2
5
c.
5
log
10
2
5 \log_{10} 2
5
lo
g
10
2
d.
5
ln
2
5 \ln 2
5
ln
2
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