Question Bank MCQ • 2 Marks Section 5: Thermodynamics & Statistical Physics Blackbody radiation

QB_PH_125: Blackbody radiation

Question Statement

When the absolute temperature of a blackbody is doubled ($T \to 2T$), the total radiant emissive power increases by a factor of:
(A) 16
(B) 8
(C) 4
(D) 2
Correct Answer
A
Verified Key

Step-by-Step KaTeX Derivation & Detailed Explanation

### Solution: Stefan-Boltzmann law: $u \propto T^4$. When $T \to 2T$, $u \to 2^4 = 16$ times.
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