Question

what is the basic principle involved the working of thermometer​

Answer 1

A thermometer has a glass tube sealed at both ends and is partly filled with a liquid like mercury or alcohol. As the temperature around the thermometer's bulb heats up, the liquid rises in the glass tube. When it is hot, the liquid inside the thermometer will expand and rise in the tube.

Answer 2

Answer:

temparature is the basic principle involves the working of the thermometer