Total radiated energy from a black body per unit area per unit time is proportional to the 4th power of its absolute temperature, Ti. e. E = 4 (Stefan-Boltzmann constant) is equal to 5. 69 X, where 10-8 Wm-2K4
H. J. Porter (Chairman - Technical Committee), Dictionary of Fire Technology, The Institution of Fire Engineers, The Victory Press (Leicester) Ltd. 1979 UK. (Fr Tech - Brit) {81}