Zeroth law of thermodynamics - Explanation, Defination.

Zeroth law of thermodynamics Zeroth law of thermodynamics states that If objects A and B are separately in thermal equilibrium with a third object C (the thermometer), then objects A and B are in thermal equilibrium with each other. Zeroth law of thermodynamics introduces thermodynamic quantity called temperature. Two objects (or systems) are said to be in thermal equilibrium if their temperatures are the same. In measuring the temperature of a body, it is important that the thermometer is in th...