Modern Physics
Radioactive Decay Law
The number of radioactive nuclei decreases exponentially with time.
Variables
N(t)unitless
Number of nuclei at time t
N_0unitless
Initial number of nuclei
\lambdas⁻¹
Decay constant
ts
Time
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Common questions
What is the Radioactive Decay Law formula?
Radioactive Decay Law is written N(t) = N₀ e⁻λt. The number of radioactive nuclei decreases exponentially with time. It belongs to Modern Physics, under Nuclear Physics.
What are the units in N(t) = N₀ e⁻λt?
In SI units, N(t) is number of nuclei at time t (dimensionless); N_0 is initial number of nuclei (dimensionless); \lambda is decay constant, measured in s⁻¹; t is time, measured in s.