Assertion: body's emissivity | /r/HasProperty | defined
Facets:
Source sentences:
text: Directional emissivity of a surface, denoted ε Ω , is defined as
text: Spectral directional emissivity in frequency and spectral directional emissivity in wavelength of a surface, denoted ε ν,Ω and ε λ,Ω respectively, are defined as