Question

principle based on which thermometer work

Answer 1

Because to measure the temperature of a body we need a scale which we can READ. The thermometer gives the reading of temperature in terms of length. Which is nothing bit due to the expansion of mercury. The change in temperature is directly proportional to the change in length of the mercury column. 

Answer 2

Answer:

hi

Explanation:

Thermometers are based on the property of expansion of liquid due to heat.