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• Radiasi kalor
T1 = 227 °C = 500 K, P1 = 1200 E
T2 = 727 °C = 1000 K, P2 = __?
Hukum Stefan Boltzmann
P = e σ T⁴ A
daya sebanding dengan pangkat empat suhu mutlak
P2 / P1 = T2⁴ / T1⁴
P2 = (T2 / T1)⁴ P1
P2 = (1000 / 500)⁴ • 1200
P2 = 16 • 1200
P2 = 19200 W ← jwb
Ok ?