MCQ Detailed View

Temperature is one of the most important physical quantities in science and engineering. Measuring temperature accurately is necessary in many industries, laboratories, and scientific experiments. When the temperature becomes extremely high, beyond the range of ordinary thermometers, a special instrument is used. This instrument is called a Pyrometer.A Pyrometer is designed to measure very high temperatures, often found in places like furnaces, kilns, foundries, and industrial metal processing plants. It works on the principle of detecting the heat radiation (infrared energy) emitted by a hot object. The hotter the object becomes, the more infrared energy it gives off. The pyrometer captures this energy and converts it into a temperature reading, allowing scientists and engineers to know the exact high temperature without direct contact.

Other instruments mentioned in the options serve different purposes:

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  Manometer measures pressure of gases or liquids, not temperature.

  
  


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  Thermostat is a device that controls and regulates temperature but does not measure very high temperatures.

  
  


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  Chronometer is used to measure precise time, not temperature.

  
  

Unlike a regular thermometer, which usually works up to a few hundred degrees Celsius, a pyrometer can measure thousands of degrees Celsius, making it essential in industries like steel production, glass making, and rocket engine testing. Since it can work from a distance, it is safe to use where direct contact with high-temperature objects is impossible or dangerous.

Understanding instruments like the pyrometer is important in physics, as it combines the principles of heat radiation, thermodynamics, and optics. This knowledge is widely applied in everyday science, particularly in modern technology and industrial processes where extreme heat measurements are required.

Thus, the correct answer is Pyrometer, the instrument specifically designed to measure very high temperatures accurately and safely.