Thermal radiation law: fill in Stefan–Boltzmann law wording Complete the statement: The total radiation from a black body per second per unit area is __________ the fourth power of its absolute temperature. Choose the correct phrase.
Mechanical Engineering
Heat Transfer, Refrigeration and Air Conditioning
Difficulty: Easy
Choose an option
-
Aequal to
-
Bproportional to
-
Cinversely proportional to
-
Dindependent of
Answer
Correct Answer: proportional to
Explanation
Concept/ApproachStefan–Boltzmann law: E = σT⁴ for a black body, where σ is the Stefan–Boltzmann constant.
InterpretationThe phrasing is that emissive power is proportional to the fourth power of absolute temperature (with σ as the constant of proportionality).
Final Answerproportional to