Measurement of Temperature

Temperature is measured by thermometer on physical properties that change linearly with temperature to give temperature readings. Physical properties of a thermometer include;

i)        Expansion of liquid (mercury or alcohol) when heated

ii)       Expansion of a compound strip of two metals

iii)     Thermoelectric property change in which when junction of two different metals are heated an electric current is generated

iv)     Change of resistance of a wire e.g. platinum resistance thermometer

Thermometric Scales

There are two scales of thermometer include;

i)        Celsius or Centigrade Scale

ii)       Fahrenheit Scale

Celsius or Centigrade Scale

This scale has 100 divisions between the upper and lower standard points. This scale was introduced by   CONTINUE READING