What is black body radiation ?

(a) Describe the principle of (i) a thermopile and (ii) a bolometer and show how these devices are used. (b) Define the term black body. What is meant by black body radiation ? As the temeprature of a black body rises, what changes take place in (i) the total energy radiated from it and (ii) the energy distribution amongst the wavelengths radiated ?

Which is not a true statement about black body radiation ?

ow energy density in black body radiation depends upon temperature?

which of the following is NOT the property of black body radiations?

which of the following is NOT the property of black body radiations?