emisszivitása
Emisszivitása, often translated as emissivity, is a physical property of a surface that describes its effectiveness in emitting energy as thermal radiation. It is a dimensionless value that ranges from 0 to 1. A perfect blackbody, which absorbs all incident electromagnetic radiation and emits the maximum possible thermal radiation at a given temperature, has an emissivity of 1. Conversely, a perfectly reflective surface, which absorbs no radiation and therefore emits none, has an emissivity of 0.
In reality, most materials have emissivities between these two extremes. The emissivity of a surface depends
Emissivity plays a significant role in various scientific and engineering fields. In thermal imaging, it affects