Solve this multiple-choice question and choose the correct option.

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Radiation fundamentals: parameters controlling emitted thermal radiation Which factors mainly affect the amount of thermal radiation emitted by a surface/body? Choose the correct option.

Difficulty: Easy

Nature of the body (emissivity/spectral behavior)
Temperature of the body
Type and condition of the surface (polished/oxidized/rough)
All of these

Correct Answer: All of these

Explanation:

ConceptRadiative emission depends strongly on temperature (∝ T⁴ for blackbodies) and on material/surface properties through emissivity (nature and surface finish).

Final AnswerAll of these.

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