Thermal Physics

Absolute Zero

What is the lowest possible temperature?

The lowest possible temperature is called absolute zero (0 K). It is the temperature at which molecular motion is at a minimum and cannot be further reduced. While absolute zero can never be reached (see the Third Law of Thermodynamics later in this chapter), the present record low temperature is 4.5 nK (4.5 billionths of a kelvin).


This is a web preview of the "The Handy Physics Answer Book" app. Many features only work on your mobile device. If you like what you see, we hope you will consider buying. Get the App