The rate at which a black body emits radiation at a temperature `T` is proportional to

A perfectly black body emits radiation at temperature T_(1) K. If is to radiate at 16 times this power, its temperature T_(2) K should be

The temperature at which a black body ceases to radiate energy is .

A black body is at 727^@C It emits energy at a rate which is proportional to :

The radiation emitted by a perfectly black body is proportional to

The radiation emitted by a perfectly black body is proportional to

One black body at temperature T is surrounded by another black body at temperate T_1(T_1ltT) . At T, the radiation emitted by inner blackbody per unit area per second is proportional to

One black body at temperature T is surrounded by another black body at temperate T_1(T_1ltT) . At T, the radiation emitted by inner blackbody per unit area per second is proportional to