This law describes the rate at which an exposed body changes temperature through radiation.$^5$
The rate of loss of heat is directly proportional to the difference in temperature of the body and its surroundings.
$$ T(t) = T_s + (T_o-T_s)e^{-kt} $$
Where $T(t)$ is a function that gives the temperature of the object at time $t$, $T_s$ is the temperature of the surroundings, $T_o$ is the initial temperature of the object, $k$ is constant that depends on the nature of the object.$^5$