the temperature of an object that emits ELECTROMAGNETIC radiation must be higher than 0k

A black body initially at 27^(@)C is heated to 327^(@)C is heated to 327^(@)C . How many times is total heat emitted at the higher temperature than emitted at lower temperature ? What is the wavelength of the maximum energy radiation at the higher temperature ? Wien's constant = 2.898 xx 10^(-3) mK .

When we consider convection with radiation in Newton's law of cooling while temperature of the object in consideration is sightly higher than the environment temperature Choose correct statements about rate of heat loss .

If the temperature of a black body becomes half of its original temperature, then the amount of radiation emitted by the body per second will be reduced to

If temperature becomes double, the emitted radiation will be :

If the wavelength of K_(alpha) radiation emitted an atom of atomic number Z = 41 is lambda , then the atomic number for an atom that emits K_(alpha) radiation with the wavelength 4lambda , is

A black body is at a temperature of 2880 K. The energy of radiation emitted by this object with wavelength between 4990 A and 5000A is E_(1) , and that between 9990 A and 10000 A is E_(2) . Find the ratio of E_(2) and E_(1) .

The temperature of a body is increased by 50% . The amount of radiation emitted by it would be nearly

The temperature of a black body becomes half of its original temperature, the amount of radiation emitted by the body will reduce to