Now playing · 03 Nuclear
Radioactive decay
A = 261.9 MBq
A
=
A
0
e
−
λ
t
,
λ
=
ln
2
T
1
/
2
A = A_0 e^{-\lambda t},\quad \lambda = \frac{\ln 2}{T_{1/2}}
A
=
A
0
e
−
λ
t
,
λ
=
T
1/2
ln
2
Activity remaining after time t from the half-life.
Laser