A blackbody of surface area 20 cm2is heated to a temperature of 600 K and is then placed on an - Physics - Thermal Properties of Matter

Question

A blackbody of surface area 20 cm2is heated to a temperature of
600 K and is then placed on an insulated stand in a room at
temperature 300 K The initial rate of loss of heat from the body to
the room is pls give a breif explaination

Sayantan · Accepted Answer

Dear Student,

Rate of heat loss can be obtained from stefan-boltzmann
relation

P=eσAT4-TC4WhereP= Rate of heat flowe=emissivity (=1 for ideal radiator )A=areaT=temperature of radiatorTC=temperature of surroundingThus substituting the given valuesP= 1×5
67×10-8×20×10-4×6004-3004P=13
78 W (  J/s)

Regards

A blackbody of surface area 20 cm2is heated to a temperature of 600 K and is then placed on an insulated stand in a room at temperature 300 K. The initial rate of loss of heat from the body to the room is.....pls give a breif explaination