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 ...
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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 ...
In cold countries, alcohol is preferred over mercury as a thermometer liquid because the melting point of alcohol can be lower. This ensures that alcohol remains liquid at lower temperatures, making it effective for use in cold climates where mercury ...
Thermocouples are made by two dissimilar metals. When these metals are joined at both ends, a voltage is generated when there is a temperature difference between the junctions. This voltage can be measured and used to determine the temperature.