How a thermometer is calibrated?

1.	How a thermometer is calibrated?
Answer» 1. For the calibration of a thermometer, a standard temperature interval is selected between two easily reproducible fixed temperatures. 2. The fact that substances change state from solid to liquid to gas at fixed temperatures is used to define reference temperature called fixed point. 3. The two fixed temperatures selected for this purpose are the melting point of ice or freezing point of water and the boiling point of water. 4. This standard temperature interval is divided into sub-intervals by utilizing some physical property that changes with temperature. 5. Each sub-interval is called as a degree of temperature. Thus, an empirical scale for temperature is set up.

Answer»

1. For the calibration of a thermometer, a standard temperature interval is selected between two easily reproducible fixed temperatures.

2. The fact that substances change state from solid to liquid to gas at fixed temperatures is used to define reference temperature called fixed point.

3. The two fixed temperatures selected for this purpose are the melting point of ice or freezing point of water and the boiling point of water.

4. This standard temperature interval is divided into sub-intervals by utilizing some physical property that changes with temperature.

5. Each sub-interval is called as a degree of temperature. Thus, an empirical scale for temperature is set up.

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