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According to Stefan's law, E ∝ T⁴.

1. E ∝ (T + 273)⁴ K
2. E ∝ (T + 273)⁴ K [727°C = (727 + 273)K]
3. E ∝ (T + 273)⁴ K
4. E ∝ (1000)⁴ K

Correct answer: E ∝ (T + 273)⁴ K

Solution

Stefan's law states that the total energy radiated per unit surface area of a black body is directly proportional to the fourth power of its absolute temperature (T in Kelvin). Option A correctly represents this proportionality.

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