Perfect black body should be black in color.

''Perfect black body is black in colour''. Is this statement true or false ?

How much energy will be emitted from a furnace at 3000K temperature active as a perfect black body per unit area in 1 hour ? (sigma=5.7xx10^(-8)" Wm"^(-2)K^(-4))

Temperature of black body is 3000K . When black body cools, then change in wevelength Deltalambda = 9 micron corresponding to maximum energy density. Now temperature of black body is :-

Why Sun is considered as perfect black body ? Explain and also Explain the importance of study of black body radiation.

Rate of emitted radiation energy from perfect black body at 500 K is proportional to . . . .. .

Obtain the equation rate of emission of heat for perfect black body by using Stefan Boltzmaan law.

Radius of a star acting like perfect black body is R, then at what temperature the rate of radiation will be Q ? (Where sigma= Stefun - Boltzman constant)

A spherical body of area A and emissivity e=0.6 is kept inside a perfectly black body. Total heat radiated by the body at temperature T

Maximum wavelength of radiation from black body at 1640 K temp. is 1.75 mum . If moon is considered as perfect black body and maximum wavelength radiation from it is 14.35 mum , then what should be the temperature of moon ?

Three large discs have same area. They are kept at equidistant in parallel. They can be considered as perfect black bodies and their thermal conductivity is very large. If temperature of first and third discs are 2T C and 3T C respectively then temperature of second disc in thermal steady state is . . . . .