What is perfectly black body ?

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

What emissive power of perfectly black body ?

Draw a neat labelled diagram for Ferry 's perfectly black body .

What is a perfectly elastic body?

The reflectance and emittance of a perfectly black body are respectively

The amount of radiation emitted by a perfectly black body is proportional to .

The radiation emitted by a perfectly black body is proportional to

For a perfectly black body, its abosrpitve power is

What acts as a perfect black body in Fery's perfect, black body?

A metal cube of length 10 cm radiates heat at the rate of 60 watt. Find its emissive power of a perfectly black body at that temperature.