Working principle of radiation pyrometer is based on the __________________?
Correct answer: A. Stefan Boltzmann law
- A. Stefan Boltzmann law
- B. Kirchoff's law
- C. Wien's law
- D. Seebeck effect
Explanation
A radiation pyrometer determines temperature from the thermal radiation emitted by a hot body, commonly using the Stefan-Boltzmann relation between total radiation and absolute temperature. Wien's law is more specifically associated with locating the wavelength of maximum emission.
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