👉 Neumann's law is a fundamental principle in heat transfer that describes the rate at which heat flows from an area where there is high temperature into another, called a boundary or interface. It states that the rate of heat flow through a material with a higher temperature than its surroundings is proportional to the difference between the two temperatures and inversely proportional to the square root of the temperature difference between them. In other words, if the temperature of one side of an object is greater than the temperature on the opposite
