This question is about the fundamental equation for radiosity in surface-to-surface radiation heat transfer, a key concept in thermal radiation.
If G is irradiation and E$_{b}$ is the emissive power, the radiosity (J) of a surface is expressed by - (1) J = G + $\epsilon$E$_{b}$ - (3) J = $ \rho$G + $\epsilon$.E$_{b}$ - (4) J = $\rho$G + E$_{b}$ - (5) Question not attempted Where $ \rho$ is reflectivity and $\epsilon$ is emissivity of a surface.
Asked in Assistant Eng. (Mechanical) Competitive Examination, 2023 · Topic: Heat and Thermodynamics (Blackbody Radiation and Laws (Stefan-Boltzmann, Wien's Displacement))
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Answer: C. (3) J = $\rho$G + $\epsilon$.E$_{b}$
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