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Question 30863
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Elasticity, Thermal Expansion, Calorimetry and Heat Transfer: Radiation MCQ

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RadiationEasyQuestion 30863

Question

Stefan-Boltzmann law states that power radiated by a black body is proportional to:
  1. A
    T
  2. B
    T²
  3. C
    T³
  4. D
    T⁴
    Correct

Correct answer

T⁴

Explanation

Power P = σAT⁴ where σ = 5.67×10⁻⁸ W/m²·K⁴. Radiation goes as fourth power of absolute temperature.

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