Temperature is a measure of hotness and can be related to the kinetic energy of molecules of a
substance. A number of physical phenomena can be used for measuring the temperature of an object. An
instrument used for measuring temperature is called a thermometer and is constructed by using one of
the following principles:
C, K, F.
where symbol C is for Centigrade (or Celsius), K for kelvin and F for Fahrenheit. If the temperature is c on
the Centigrade (or Celsius) scale, then the absolute temperature on the kelvin scale will be:
the Fahrenheit scale will show:
There is also another temperature scale, called Rankine (symbol R). If the temperature is f on the
Fahrenheit scale, the Rankine scale will show:
Absolute temperature or thermodynamic temperature (degree kelvin, K) is a fundamental dimension. It can be related to the energy possessed by matter and is an SI base unit.