Which among the following thermometers is preferred for measuring temperature around 1250° C?
Which among the following thermometers is preferred for measuring temperature around 1250° C?

Q. Which among the following thermometers is preferred for measuring temperature around 1250° C?

A.            Mercury thermometer

B.            Constant volume gas thermometer

C.            Optical pyrometer

D.            Platinum resistance thermometer

Answer: Optical pyrometer
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