Gas thermometers are more sensitive than liquid thermometers because gases has higher coefficient of expansion. Gas molecules expand more readily in response to temperature changes compared to liquids, leading to more significant changes in volume for a given temperature change. ...
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Thermo Couple Thermometer is based on Seebeck’s effect. This principle states that when two dissimilar metals are joined at two junctions and one junction is at a different temperature, an electromotive force (EMF) is generated, creating a voltage that is ...
Very high temperatures are measured by Absolute radiation thermometer. Absolute radiation thermometers, also known as pyrometers, measure temperatures based on the intensity of thermal radiation emitted by an object. They are suitable for measuring extremely high temperatures, such as those ...
Total Radiation Pyrometer is based on Stephen’s law. This principle states that the total radiant flux emitted by a black body is proportional to the fourth power of its absolute temperature. Total Radiation Pyrometers utilize this law to measure temperature ...
Sun’s temperature is measured by pyrometer thermometer. Pyrometers, specifically designed for high temperatures, are used. They determine temperature by comparing the brightness or color of the Sun’s light to a calibrated filament’s brightness or color. This allows inference of the ...