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Physics Hard CSS FPSC Uploaded: 05 Aug 2026

Which law states that energy radiated by a black body is proportional to the fourth power of its temperature?

  • A Stefan-Boltzmann Law
  • B Boltzmann's Law
  • C Wien's Law
  • D Newton's Cooling Law
Correct Answer: Option A — Stefan-Boltzmann Law
Explanation:
The Stefan-Boltzmann Law states that total energy radiated per unit area of a black body is proportional to the fourth power of its absolute temperature expressed as P equals sigma T to the power 4.
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Submitted by: PaperMCQs
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