# Resolve RDF Terms

quantitykind:Emissivity
http://qudt.org/vocab/quantitykind/Emissivity

### Recommended prefix

quantitykind:

lang:en
Emissivity
lang:""
Emissivity of a material (usually written $$\varepsilon$$ or e) is the relative ability of its surface to emit energy by radiation.
lang:""
$$\varepsilon = \frac{M}{M_b}$$, where $$M$$ is the radiant exitance of a thermal radiator and $$M_b$$ is the radiant exitance of a blackbody at the same temperature.
lang:""
$$\varepsilon$$