The temperature of sun is measured by which thermometer?
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Pyrometer is a type of thermometer to measure the temperature of various surface using remote sensing principle
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A pyrometer is used to "measure the temperature" of various surfaces.
Explanation:
An optical pyrometer measures the temperature by comparing the brightness. Color variation with a rise in temperature is taken as an index. It consists of a temperature lamp.
The current inside the 'lamp' is adjusted with the 'brightness of the image' till both are equal. The "intensity of light" depends on the 'temperature' of the object so the current passing in the 'lamp' becomes a measure to measure temperature.
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