# What is Newton's Law of Cooling?

$- \left(\mathrm{dT} / \mathrm{dt}\right) \propto \Delta T$
$\implies - \left(d \theta / \mathrm{dt}\right) \propto \Delta \theta$
Newton's Law of Cooling states that, if the temperature 'T' of the body is not very different from that of the surroundings '${T}_{0}$', then rate of Cooling '(-dT/dt)'or' $- \left(d \theta / \mathrm{dt}\right)$' is proportional to the temperature difference between them.