Definition of radiance in English:


Line breaks: ra¦di|ance
Pronunciation: /ˈreɪdiəns


[mass noun]
  • 2 Physics The flux of radiation emitted per unit solid angle in a given direction by a unit area of a source.
    More example sentences
    • The downward radiance measured by the infrared interferometer is a combination of thermal emission by atmospheric water vapor and by the cloud ice mass.
    • This irradiance and the radiance in the opposite direction were then inserted into equation to calculate the ideal reflectance.
    • The effect is most prominent at shallow depths, where the light field is usually asymmetric, due to highly directional and intense solar radiance.

More definitions of radiance

Definition of radiance in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day astrogation
Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
(in science fiction) navigation in outer space