The thermometer whose reading is indicated by a change in colour of its thermometric property is the?
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Correct Answer: Option D
Explanation:
A pyrometer is instrument for measuring high temperature.
The optical pyrometer is one in which the luminous radiation from the hot body is compared with that from a known source.
A pyrometer is instrument for measuring high temperature.
The optical pyrometer is one in which the luminous radiation from the hot body is compared with that from a known source.