Traditional Culture Encyclopedia - Hotel franchise - Press the small lamp with your hand to deform the table, and the red dot on the wall will also shift. The following instruments use this principle.

Press the small lamp with your hand to deform the table, and the red dot on the wall will also shift. The following instruments use this principle.

Spring dynamometer, of course. '

The phenomenon you described is an amplification experiment of tiny deformation. That is, the basic principle is that all objects will be deformed (inconspicuous and difficult to observe is called micro-deformation. Spring dynamometer also uses the relationship between spring deformation and force, namely Hooke's law.

So the basic principle is the same.

Thermometers are mainly used to measure the expansion and contraction of liquids.