The Stefan-Boltzmann law estimates the total amount of emission, per unit area, leaving the surface of a blackbody. This is termed the total emittance. The Stefan-Boltzman law is described by the formula Eq (1): E* = OSB .74 Eq (1) Where E* is the total emittance in W/m, OSB is the Stefan-Boltzmann constant with a value of 5.67 x 10-8 W/m.K4 and T is the blackbody temperature in K. A typical campfire under good combustion conditions has a temperature of approximately 1200 K. Assuming a 1.0 m surface area for the fire and perfect conversion of heat energy to electricity, how many 100-Watt light bulbs would the radiation from this fire be able to sustain? Answer:

The Stefan-Boltzmann law estimates tne toral amount of emission, per unit area, leaving the surface of a blackbody. This is termed the total emittance. The Stefan-Boltzman law is described by the formula Eq (1): - T4 Eq (1) E=SB Where E is the total emittance in W/m2,SB is the Stefan-Boltzmann constant with a value of 5.67108W/m2K4 and T is the blackbody temperature in K. A typical campfire under good combustion conditions has a temperature of approximately 1200K. Assuming a 1.0m2 surface area for the fire and perfect conversion of heat energy to electricity, how many 100-Watt light bulbs would the radiation from this fire be able to sustain