The inner surface of an industrial furnace wall emits radiant energy at the rate of
PHYSICS · Multi-part · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
The inner surface of an industrial furnace wall emits radiant energy at the rate of 5.0×104 W m−2. Treat the wall surface as (i) an ideal blackbody and (ii) a real surface of emissivity 0.20.
(i) For case (i), determine the absolute temperature of the wall surface.
(ii) For case (ii), calculate the absolute temperature that would be required for the real surface to emit the same radiant power per unit area.
(iii) Compare and comment on the two temperatures obtained.