Rates of emission of heat by perfectly black body maintained at temperatures 27° C and 927° Care in ratio

Rates of emission of heat by perfectly black body maintained at temperatures 27° C and 927° C are in ratio

Emissive power of a perfectly black body

Emissive power of a perfectly black body

what is emissivity of a perfectly black body ?

The ratio of the rate of radiation of heat by a perfectly black body at a temperature 527^(@)C and 127^(@)C is

What emissive power of perfectly black body ?

Compare the rates of emission of heat by a black body maintained at 727^@C and at 227^@C , if the black bodies are surrounded by an enclosure (black) at 27^@C . What would be the ratio of their rates of loss of heat.

For perfectly black body emissivity (e) is

For perfectly black body emissivity (e) is