Which instrument is used to measure extremely high temperatures, such as that of the sun or incandescent bodies, based on radiation laws?

💡 Solution & Explanation

A pyrometer is designed to measure extremely high temperatures, such as those of the sun or molten metals, by detecting the thermal radiation emitted by the object without requiring direct physical contact. Calorimeters measure heat changes in chemical reactions, while barometers record atmospheric pressure and hydrometers gauge liquid densities. High-temperature pyrometers rely on Stefan-Boltzmann radiation laws for their accurate functioning in industrial and scientific applications.