Black Body Radiation
GENERAL OVERVIEW First of all we have to know that everything in the universe is in motion .It seems to be odd , for example a stone lying on a road seems to be stationary but this is not so. At macroscopic level (observable with naked eyes) that stone was found to be motionless but actualy that is not reality. At molecular level , molecules of stone are in motion like vibrational , rotational motion and so other. This is true. Black body radiation :- Since all the matters around us are in motion , and one of them is vibrational motion of the particles of which they are composed of . This vibrational motion causes the emission of radiation. At low temperature the radiations are of low frequency but as the temperature increases frequency increases. Even with the higher frequency, the radiation of lower frequency were also emits out . This happens only in case of solid material which emits continuous range of frequency's radiation. In case of gases the nature of radiation