High temperature of around 2000Â°C of incandescent gas mantles is me – McqOptions

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1.	High temperature of around 2000Â°C of incandescent gas mantles is measured by a/an
A.	specially designed thermocouple.
B.	optical pyrometer.
C.	radiation pyrometer.
D.	none of these.
Answer» D. none of these.

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