Write the types of thermometers used in daily life and mention their working principles.

Question

Accepted Answer

(i) Liquid-in-glass thermometer — works on the principle of thermal expansion of mercury inside a capillary tube. (ii) Digital thermometer — works using a heat-sensitive thermistor whose electrical resistance changes with temperature. (iii) Radiation (infrared) thermometer — works by detecting the intensity of infrared radiation emitted by a body, without contact.