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A radiation pyrometer is based on ___________

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A radiation pyrometer is based on ___________

(a) Planck’s law

(b) Stefan-Boltzmann law

(c) Rayleigh-Jeans law

(d) Sakuma-Hattori equation

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Correct choice is (b) Stefan-Boltzmann law

Easiest explanation: The principle of radiation pyrometer is based on a standard radiation body known as a blackbody. These pyrometers are calibrated to indicate blackbody or true temperature. The Stefan-Boltzmann law expresses the rate of radiation energy.

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