Blackbody infographic.pdf

1. Blackbody It is a perfect emitter and absorber of thermal radiations following Kirchhoff's law. A blackbody is a rigid, closed unreal body that can absorb all electromagnetic radiation that falls on it regardless of its frequencies, but it reflects none. On heating, the blackbody releases all thermal electromagnetic radiation that it absorbed previously. These are blackbody radiations. A blackbody radiates heat energies without affecting the intervening medium. It has the highest emissive power of all other bodies at that particular temperature and wavelength conditions. Hot blackbody emissions An ideal black body is an imaginary perception of Gustav Kirchhoff. The blackbody is inexistent. An object with above 0.95 emissivities is an approximate blackbody. A graph between emissive power and radiation wavelength at a fixed temperature T is known as a blackbody curve. At different source temperatures, we observe different black body curves. The black body spectrum depends only on the temperature. And it is independent of the shape, structure, and composition of blackbody enclosure. Factors affecting blackbody emission Laws governing blackbody emission Temperature Planck quantum law Emissivity Wien displacement law Stefan-Boltzmann law Surface area Blog:https://jayamchemistrylearners.blogspot.com/