vocabulary.dcterms:description descriptions of the classes and properties @en
rdfs:comment The spectrum of radiation describes its,, as the portion of electromagnetic radiation that, wavelengths in the range of approx. 380 to 780 nm (1 @en
vocabulary.dcterms:description descriptions of the classes and properties @en
rdfs:comment Luminous flux is a photometric measure of radiant, flux, i.e. the volume of light emitted from a, the interior as a whole or for a part of the @en