1、triple point of water
2、In 1954 it was decided by international agreement to use the triple point of water as the reference point.
3、A unit of temperature equal to 1/273.16 of the Kelvin scale temperature of the triple point of water.
4、A unit of absolute temperature equal to1/273.16 of the absolute temperature of the triple point of water. This unit is equal to one Celsius degree.
5、Some practical problems arising from the adoption of the absolute scale ol temperature as standard in place of the Celsius scale are discussed. The absolute scale is fixed by assigning a numerical value (say T_3=273.1700) to the triple point of water.
