Chapter:

Radiation-:-Processes-and-Properties

A black body of total area 0.045 m2 is completely enclosed in a space bounded by 5 cm thick walls. The walls have a surface area 0.5 m 2 and rmal conductivity 1.07 W/ m K. If inner surface of enveloping wall is to be maintained at 215 degree Celsius and outer wall surface at 30 degree Celsius, calculate temperature of black body